learning is the overhead with the best return on investment.

not everybody wants to jump into learning solutions that solve other people problems, prefer to learn the ones that solve theirs. if someone doesn't need coffeescript, there's no ROI.

But you really don't need to learn CS... It's just a slightly different syntax that you can learn literally in 20 minutes, but makes your code more robust and clean (eg; no more comparing against "undefined" and then nil, just put a ? after variable name - it saves you time and you don't accidentally forget about it. It makes your code better)

Nobody would argue about his comment if CS wasn't such an easy language to learn. If you know PHP, you can learn writing in ASP.net in a week, but if you know JavaScript, you can sing in CoffeeScript in an hour.

If you think that tower may solve your problem and the only obstacle is that it's written in coffeescript, then learning coffescript is now solving your problem.