Actually, those 'stagnant' languages are powering your OS, your browser, the backend server, etc. They've had millions of dollars invested into them for development, implementation, and optimization. Doesn't mean they're good, but more that they're [usually] good enough that you can completely ignore them. Talk about abstraction!

Anyway, lots of frameworks coming out != progress. Similarly, lack of new frameworks != stagnation. It often implies maturity, especially if the language has undergone a previous period of hype.

Good tech stays around. Everything else dies by the wayside. Easier to just sit back and see who's left standing a year later. React looks desirable in my eyes because it isn't a framework with a God complex (aka all 'opinionated' frameworks).