The first part of most migration guides is a stark warning of the demise of Magento 1. You know that. In June 2020, Adobe axe officially ended support and, amazingly, tens of thousands of stores are still contributing to this day using Adobe without knowing that something broke apparently.
The reality is, the question is not about migration. That’s what really happens when you do, and how many teams get it wrong until three months in.
Table of Contents
The Platform Shift Is Bigger Than It Looks
It’s Not an Upgrade – It’s a Rebuild
This is the one which stumps people. There is no newer version of Magento 1.Magento 2 is not a newer version of Magento 1. It’s totally a different platform, different architecture, different file structure, etc. You are not clicking on an “upgrade button”. You’re setting up a brand new M2 instance and carefully moving things across.
The migration officially addresses four concerns: Data, Extensions, Themes and Custom code. Each one will take a different path, have their own set of risk, and other timing.
What surprises most teams is that each of the four work streams does not work at the same speed. Tabulation of the data can be scripted and execute in a phased manner. Rebuild and rebuild themes is just a design endeavor. Extension reviews are subjective and will be done on an individual basis for each plugin. And custom code? That is typically an exercise in rewritting logic from the ground up as M1’s designs just cannot be represented in that format.
Where the Architecture Gap Hurts Most
Magento 1 is a system, where everything is tightly coupled. Magento 2 switched to a service-oriented, modular architecture. That’s a good change for long-term performance and maintenance, though, and everything from the old codebase that just “works” doesn’t from the new one.
I’ve seen and heard of migration projects where the developers thought that their M1 modules would need little modification. That guess extended weeks in most cases. But, the smart way around the issue is to audit each of the extensions down to their business value before considering whether to port, replace or remove them outright.
The Data Migration Tool: Useful, But Not Magic
How the Official Tool Actually Works
The official, supported method of transferring your store’s core content – products, customers, orders, configurations, and promotions – is through Adobe’s Magento 2 Data Migration Tool.
A CLI tool, with a GitHub project page and Adobe Experience League documentation.
The tool can be executed in three stages of operation:
- Moves: moves settings are stored.
- Data mode: processes bulk transfers.
- Sync changes: sync changes that occur during migration (new orders, new customer) (done in Delta mode)
Each mode consists of three phases: (1) integrity check, (2) the transfer, and (3) verification. XML map files are used to specify the structure from Magento 1 to Magento 2, which includes Magento 1 tables and fields to map to Magento 2 structure.
One thing I noticed while trying to do all the documentation was the assumptions made against having a clean source database. The longer you have quote table bloated with years of quote data, abandoned carts or duplicate customer logs, the slower and sometimes borked the migration becomes.
The Delta Sync Strategy Most Teams Get Wrong
During most of the migration, the M1 store won’t be down because of delta mode and it will only ever be down for a short cut over window. Use the Delta mode just before the go-live, or after a few hours, run Data mode on a checked out copy of the database to get the changes.
Sounds clean. It takes careful timing and a good set-up plan to use effectively in practice. Those that fail to plan properly will get inconsistent data or a greater window of downtime – not ideal for a live ecommerce service.
The direct_document_copy feature can make applying changes to these databases faster if both databases are using the same MySQL instance. Fortunately this aspect of a book isn’t covered in most of the summary reviews.
What the Magento 1 To Magento 2 Migration Actually Breaks
Your Extensions Won’t Survive the Jump
There are no Magento 1 extensions that are compatible with Magento 2. Not even close. You’d have to take the time to go through each one and find out just how important it is, if there is a Magento 2 version available, and even if there is, if a different option exists or if you chose to build it in Magento native.
When more complicated, such as extensions containing custom data, it becomes complicated. By default, Data Migration Tool is unable to decipher what to do with data from tables it knows nothing about if a plugin built its own plugin tables in M1. Adobe has been implying the opposite of that when it comes to extending the tool, they will do so via the extension points (adding custom steps and handlers), not by changing the core migration logic.
The teams who attempted to think around this by doing something as simple as hacking the core migration steps in order to avoid the normal process wound up fragile setups which would fail during the Delta sync phase. Extension point approach works a bit slowly at the beginning, but is more solid at runtime.
Your Theme Is Gone – Fully
The Magento 2 theming system is totally different. New structure for layout XML, LESS/SCSS workflows and a new template hierarchy. No transfer of any of your Magento 1 .TMG files.
This is the case for most stores, who will either pick some base theme (such as the Luma theme or a commercial set) or commission a custom rebuild. No matter if you are thinking about the headless or PWA frontend, this might be the perfect time since it’s not the second disruptive project that’s coming your way later.
Migration timelines can be extended during the theme rebuild. It is actually truly an independent project of design and development taking place parallel to the data work.
SEO Risk Is Real and Underplanned
The URL structure may vary greatly depending on M1 and M2. Everything from category paths to product URLs to layered navigation is subject to change. That equals to 404 errors, loss of link equity and even traffic loss that will take months to come back from if they don’t have a suitable SEO migration approach.
The right way: Start by creating a 301 map, then create a full inventory of URLs before migration happens, validate 301 map and structured data in the new M2 environment, and stay very close to GSC for the first 60-90 days after migration.
This is related to a wider picture of migration planning. If you’re undergoing similar cryptographic and/or infrastructure changes at the same time as you’re on a platform journey, the concepts covered in Planning and Executing Your PQC Migration – including inventory, phased (otherwise known as staged) execution, and a plan for rollback – apply here more than you might think. In the end, good stack is good stack, which is good migration.
Timelines Nobody Likes to Hear
3 Months or 12: What Determines the Difference
For a “typical store,” the general timeframe cited by Adobe partner surveys and migration guides is 3–6 months.The timeframe commonly cited by Adobe partner surveys and migration guides for a heavily customized or integrated store is 9–12 months; for a “typical store,” it is 3–6 months.
The factors that encourage you to go to the longer end:
- The catalog is large, has lots of products (100k+), and complex attributes sets.
- A wide range of custom integrations like ERP, PIM, 3PL or CRM.
- Custom code that is not available on M2.
- Legacy or unwell-documented code in the M1 codebase.
The stores that complete first seem to have honestly cleaned up before they began – they do not have all their products to sell so the problem is you will find no dead products, no old orders to backlog, no honest sign offline, etc.
The damage is really occurring at the rushed cutovers. The shortcuts taken of omitting Regression Testing, omitting SEO checklist, or shipping without a Delta sync plan, will produce problem(s) after go-live – and will directly affect revenue – which take weeks to resolve.
What’s Changing in 2026 and Beyond
Headless and PWA Are Reshaping What Migration Means
Magento 2 is matured by itself. That’s still in its development stages is how merchants want to operate it. The front end full separation projects are now more common – utilizing Magento 2 as a backend commerce engine and, serving the storefront through PWA Studio, Vue Storefront or a custom-built React/Next.js front end.
The trend is relevant for anybody who is considering migration at this moment. With the theme rebuilt even if you’re doing it anyway, it’s less hassle to go headless than it would be to disrupt every working M2 theme setup again in just three years’ time.
Cloud-Native Deployments Are Becoming Standard
More and more, post-migration M2 environments are landing in Adobe Commerce on Cloud, Docker based environments, and Kubernetes deployments. Usually infrastructure modernization (building a new host, configuring the CDN, setting a new strategy for caching) accompanies the platform work in migration projects.
A typical error is to consider these as stand-alone projects. It was noted that teams that folded in infrastructure decisions onto the plan for migration would experience smoother go-lives as compared to teams trying to plan for infrastructure separately.
Free Resources That Are Actually Worth Your Time
Where to Learn Without Paying for a Course
The official Adobe Experience League docs about the Adobe Data Migration Tool are indeed sophisticated – about modes, steps, stages, and extension points, etc. There are configuration examples for the tool in its GitHub repository, and links to migration guides are not readily available in Google search.
Apart from official sources, there are several community resources worth mentioning:
- The migration tutorial provided by MGT-Commerce (2026 updated) – provides practical information on the entire migration checklist, extension review, SEO analysis and data cleanup.
- MageComp’s full migration guide with prerequisites and Data Migration Tool installation procedure.
- This is Meetanshi’s step-by-step guide, which is easier-flowed and useful to get oriented with.
- Super useful migration guide by Goivvy, particularly useful for common problems and solutions.
Trying to find out how to do video walkthroughs on YouTube yields the same sort of free content that you didn’t have to buy at an agency and comes from customers without the punch of agency blog posts.
To extend the context on migration success as a security / compliance practice, the NIST post-quantum cryptography project is a helpful parallel; in both cases, a successful migration involves a phased approach, inventory of risks and stages of migration.
The Business Case Beyond Compliance
Performance Numbers That Actually Matter
On average, Magento 2 is about 50% quicker to load a page and about 39% more able to process orders per hour than Magento M1 with the same hardware and software setup. These are NOT marketing numbers, these are derived from benchmarks taken on similar setups.
The benefits when a page loads faster as far as measurable improvements in conversion are concerned is of special value to high traffic stores. If the order processing capacity is important in high volume stores during peak times such as promotions or a seasonal ramp up.
For Magento 1 users, the new release of Magento 2 features some of the same third-party add-on functions that now come pre-loaded, such as better admin UI, built-in full page caching, and improved checkout. This implies less extensions in your stack, which means less compatibility issues, and a more stable retail, generally speaking.
Using Migration as a Cleanup Opportunity
Let’s face it, one of the overlooked parts of the moving is to go through the cleaning process properly. Just drop away all the unused extensions. Store history of events without the requirement to be current. Eliminate untouched CMS pages after couple of years. Trim your product mix.
It is always easier to get good performance and a more maintainable store out of scratch than from running with a lot of data in it from the beginning.
Honest Recommendation
Magento 1 to Magento 2 is not a weekend project, it’s not something that can be planned as if everything is going according to your plan. Good stores do it as a project that has a definite timeline, has a definite testing phase and has an honest extension audit.
For developers and agencies, the top paying niche services at the moment are SEO-safe, zero downtime, or headless-ready packages; where the store owners on M1 are feeling unsure.
As a store owner, or as a CTO, it’s easy to figure out that for each month on M1 it’s a month of an unpatched security threat on a shrinking platform. Migration is a very real thing, but it’s constrained. The risk of staying isn’t.
The tools have been proven to be ready to use. Documentation is good. The route has been well established. The quality of the planning and honesty in the scoping up-front largely determines how it goes.
I’m a technology writer with a passion for AI and digital marketing. I create engaging and useful content that bridges the gap between complex technology concepts and digital technologies. My writing makes the process easy and curious. and encourage participation I continue to research innovation and technology. Let’s connect and talk technology!
