I'm not exactly in the same boat, in that I love the
idea
of CoffeeScript, but I've got too many years of JS habits that CS asks me to break.
I'm pretty productive with JS, and even if I'm not writing things that change the world, I feel like I'm busy enough that there's never been a good time to effectively relearn a language that I already know.
On the same token, it always chafes me a little bit when I see people ask questions on StackOverflow in Coffee. I might have been able to help them if they hadn't, but seeing it in Coffee, despite being 'plain old' JS, means that I can't.
Still though, I appreciate the value of it. The main reason I work in Python is for readability. I completely get the value, and I consider it worthwhile, but until Coffee hit some form of critical mass (even if just on the teams I'm working with,) then it just doesn't quite make sense for me.