This. They took half of FreeBSD without giving them a single cent, only to never give horseshit about them afterwards. They're didn't even add support for FreeBSD to Swift despite the fact it would cost them very little effort, just to underline how little they care.
I am aware of this. Hence the reason for mentioning it–Apple clearly chose to use BSD because it's not GPL, but I don't think it's fair to complain that Apple is bound to contribute back. This is the tradeoff the project made when they chose the BSD license.
