Counterpoint: I'm currently employed building many apps for an enterprise you'll never visit. React+Typescript rewrite of our legacy "lean" Javascript has measurably improved the productivity of the team and the maintainability of code.

I can't imagine going back to learning bespoke libraries written by (especially!) hotshot cowboy coders. React makes everybody on the team better, and literally no customer has ever complained about the extra 200ms load time.