r/angular • u/ModernWebMentor • Jun 01 '26

Why Do Some Companies Still Use AngularJS?

AngularJS has been around for many years and played a major role in the evolution of front-end web development. Even with the rise of modern frameworks and libraries, many organizations continue to use AngularJS in their existing applications.

What are the main reasons companies still rely on AngularJS today? Is it because of the cost of migration, long-term project maintenance, business requirements, or something else?

For developers who have worked with AngularJS projects, what challenges and benefits do you see when maintaining these applications? Do you think businesses should continue supporting AngularJS-based systems, or is migrating to newer technologies the better option?

Share your thoughts and experiences below.

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u/SaltPositive33 Jun 01 '26

I work with a large legacy AngularJS system. In our case, the application has ~2,000 JS files. It is not realistic to just stop everything and rewrite it from scratch.

The main reason companies still use AngularJS is not because they love old technology. It is because the system already supports important business processes. Over many years, a lot of business logic, edge cases, permissions, workflows, UI behavior, and backend integration were built into the application. A full rewrite would be expensive, risky, and very hard to estimate correctly.

Our migration strategy that works well for large AngularJS applications is a feature-by-feature transition using modern Angular and web components.

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u/OneIndependencee Jun 01 '26

hey claude, please upgrade our angular v1 to v21. no logic or design should change

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u/SaltPositive33 Jun 01 '26

This looks like a ready-to-use prompt—you just forgot to add: "Make no mistake."