I think CoffeeScript was definitely popular outside the Ruby community, too, for a while. (After all, Dropbox was/is a Python shop, not Ruby!) Speaking strictl

I think CoffeeScript was definitely popular outside the Ruby community, too, for a while. (After all, Dropbox was/is a Python shop, not Ruby!) Speaking strictly for myself, while I liked a lot of what CoffeeScript was trying to do, I didn't love the "one layer removed" feel of writing in a language that wasn't the one actually being executed. Also, I often found CoffeeScript to be cryptic in ways that vanilla JS, for all its quirks, really wasn't. So I think it felt like the future for a couple years, until JavaScript ES6 took off and it started feeling kind of superfluous -- ES6 felt like it was taking the good parts of CoffeeScript while leaving a lot of the quirks behind.