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Re:What's new in Rails 5? by technion on Friday September 25, 2015 @07:32AM (#10277518)
There's a cultural impact - it's hard to look at Rails without being pushed in that direction.

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.

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.