Re:What's new in Rails 5?
by KurtMueller on Friday September 25, 2015 @08:29AM
(#10277727)
This nifty web app is a good starting point: http://js2.coffee/
It's not perfect but it's how I learned coffeescript.
Other than that, I don't think Rails necessarily pushes either for/against coffeescript. You can either use it or not. Plenty of rails apps have been written in plain 'ol js.
Does it directly impact me now that I choose to ignore it? No. Does it impact a newcomer, particularly one that's into JS? Yes.