[sukulaku]

Well, I believe React is the right way to do JavaScript UIs until something even better comes along.

It's not about Facebook - it's about the design that promotes "functionality" and modularity etc. That's the big deal.

Angular and Ember are both needlessly complicated to begin with, but even more so because of all the two-way state-mangling going on.

So yes, switching to React will be ever-increasingly worth it, because the benefits of not having to deal with Angular will keep compounding over time.

So instead of "opportunity costs", you'll have "opportunity benefits" :P