Coffeescript vs Javascript

I got to know that discourse was using a hybrid Coffeescript platform.
I found this Topic created by @sam back in 2013, where I got to know a lot of views from experienced developers.

as at 2016, I was wondering whether coffeescript will further improve the language or will it become obsolete. (is coffeescript a language worth learning?)

Looking for your opinions on this matter. (btw any typescript devs here?)

I’m sorry but meta is a place to discuss the Discourse software, not your favorite programming language :wink: