[GeZe]

LiveScript compiles almost 1 to 1 to JavaScript and has no runtime, making it easier to debug and comprehend for JavaScript programmers. You can access and use any JavaScript library without having to resort to a special syntax. For JavaScript programmers, it may be easier to use LiveScript. For Haskell programmers, it may be easier to use Fay.

I think many JavaScript programmers are looking for JavaScript (CoffeeScript) + functional programming rather than something purely functional as it allows them to use all that they've learned and mastered from JavaScript (often in an enhanced way) while using functional concepts as they learn them.