React is now effectively part of the Rails stack
matthewbellantoni.comToo bad Ember faded
Author here. In the article there's some evidence that Ember is still at least talked a lot about in Rails job posts. Maybe I'll look into that more the next time I do this kind of digging.
Personally, I made a couple of attempts to learn Ember. Though it was well documented and looked great, I just bounced off of it both times. And I never had an urgent need for it, so...I eventually found Stimulus easier to pick up.
It was good, still is probably, but when the community is that small getting stuff done will always be harder than with React.