I'm still somewhat scarred from the time I invested a ton of time into Angular.
Not sure you would be able to answer this, but is React something that works well with Rails out of the box? For instance, I found that Angular (when I was learning it) required a fair bit of shoehorning to get it to work well with rails.
I'm a Rails developer. I work on pretty standard web apps for a living. Some more complicated than others, but still, web apps.
I still haven't found a person that was able to give me a concrete reason why someone like me should invest time and resources into learning React and using it in my projects.
This is an honest question, I'm not trying to be sarcastic. It's just that there are so many frameworks that come out that it's very hard to know where to invest your time.