I have noticed that inheritance is largely ignored by experienced developers but it's a hard argument to make that "all good JS programmers do this".

Classes are invaluable and are an extremely efficient and ergonomic way to manage state in GUI applications.

That said, avoiding classes was published in some blog post at some point and the JS hype machine went crazy with FP. As a consequence, I have yet to observe a maintainable React codebase. Good looking and performant React applications are even fewer and farther between.

Personally, writing idiomatic React has me focus too much on render cycles that I think less about how the application looks & feels. Appropriate abstractions become more difficult to conceptualize and any non-trivial application ends up a 5mb bundle with no multi-threading or optimizations. This is also what I have observed "the best JS devs" do in the wild.