[underwater]

Most of the JavaScript community is already using this, thanks to tools like https://6to5.org/.

Developers are excited about new language features not because of browser support, but because it standardizes patterns they were already using (fat arrow functions, Promises, modules, classes, etc.) through CoffeeScript and third-party code.

[bshimmin]

I think your "most" is rather optimistic.

(6to5 didn't even exist six months ago.)