"Why the PureScript community uses Bower" explains why Bower was chosen: http://harry.garrood.me/blog/purescript-why-bower/
I don't understand why Bower is such a sticking point for people. It works perfectly fine for PureScript and (as the article explains) was the right tool for the job.
Any word of when this will be supported/promoted officially? Just got this response from one of my former JS colleagues: https://twitter.com/keirasaid/status/924169973878046721 - it's pretty hard to convince JS developers to use something that is still recommends using Bower for package management. :/
psc-package does* very much look like it's going to be the "sanctioned/endorses/semi-official" tooling for pkg-mgmt one way or the other.
This popped up just now in my feed reader: https://qiita.com/kimagure/items/0d9354900d7a7dbd3864