[cdaven]

First, Angular uses classes, and React supports class-based components.

Then, if you have converted lots of Javascript into Typescript, you have probably found several type-related bugs.

On one hand, this makes you (me) trust Typescript more, and feel safer knowing that your types are correct.

Later, you discover that a few of the declared types are wrong! You also still get "this" wrong in callbacks.

You could say that Typescript lets you try to get your types right, but you have to do the heavy lifting yourself.