I think it is quite funny how a tool to turn proper code into the mess that is ESxx can become so popular. I'm still using Coffeescript 2, it's awesome :)
I complement it with Rust as needed, which is the only language that justifies having a verbose syntax.
Those two couldn't be farther apart, but their combination covers an extremely wide spectrum of programming tasks. From prototyping, to incrementally improving the robustness and performance as needed.
jashkenas did a great job, and CS2 is a very elegant and ongoing effort.