I didn't understand this. Isn't MobX the "classical" way of databinding everybody frowned upon for years? And now that React finally eased that pain with Flux and then Redux, they bring it back?
I don't think that many people switched to MobX to be honest.
It's very similar to knockout observable and while it works, I don't think I would use that approach again. I suspect people like the familiar OO syntax of MobX. I can't think of advantages it has over plain old streams (most.js, flyd.js)
