The biggest advantage of this progress is that there is a lot experimentation with new kind of tools (for example Redux Dev Tools. This is fascinating. I mean Redux is great, but the fact that there are dedicated dev tools for this? Wow. I'm waiting for new tools (maybe every popular library from now on will have its own dev tools? Or maybe somebody will make universal dev tools for all React libraries?).

I think what's happening inside React ecosystem and this constant flux of innovations is not comparable with anything in the webdev before (maybe except Ruby community which is also pretty innovative).