I don't see the advantage of having many different js package managers in a project, so I am fine with 'standarizing' the usage of only one. I am the author of bootstrap-colorpicker and I find too much having to publish it in bower, npm and composer...

I wish we had an universal package manager for git based projects regardless of the language.

I already shifted all mine to NPM and dumped Bower. Not because of any other reason that people started to share it there, I think Bower is faster..?

I prefere jspm because it uses ES6 modules and uses rollup's tree shaking.

Every developer likes the competition that makes browsers more performant and in the meantime hate that his has to adapt his code to an old browser, for example, IE6.