Personally speaking from what I saw around the internet and my own experiences with peers using it, it was contentious whether it was so forward-thinking or sufficiently differentiated to make it worth it.
Back in 2013/14 I remember on a couple of occasions being quite annoyed when I found npm packages that I wanted to bugfix were written in Coffeescript rather than plain old JS. It always seemed so unnecessary, and tended to push me towards alternative solutions.
