> Everyone is looking for React or Vue or whatever developers. Have companies stopped looking for Developers who have solid grip of Javascript who can pick up any framework?

That's just a symptom of the commoditisation that developers themselves have been so happily furthering for quite some time by identifying as a set of TLAs rather than as business / automation / efficiency problem solvers.

"React", "Vue", "Whatever developer" in that case is just a further specialisation from "JavaScript developer". It's not fundamentally different, though.