[jeroenhd]

I don't see the problem, to be honest. Everybody is using this guy's work for free and then he needs to deal with complaints that it's not good enough, because it supports ancient browsers in a way that's not to their liking.

You can always fork the projects with this guy's polyfills if you want, but you'll end up forking quite the collection of projects. Most of them are very minor and only end up polyfilling anyway, so you can probably get rid of the packages you don't want in an afternoon. Fork them and maintain them yourself if you're so inclined, don't complain that the free work he's doing for you isn't to your specifications.