apple is scummy just like the other big tech companies but it’s one of the least scummy out there, especially wrt open source.
Maybe with regard to open source, because that benefits them as a company - let others fix their bugs for free. But definitely not with regard to free software.
The FreeBSD desktop exists, it is called “Mac OS”.
Linus Torvalds used the GPL for his kernel, forcing companies to release the source code if they improve it and distribute it. The main userland was a lot of GPL licensed GNU software for a very long time, with a similar effect.
The BSD folks, on the other hand, decided to give everything away, by using much more “liberal” licenses. Apple took the BSD base, bolted their UI on top of it and gave almost nothing back. That would not have happened if BSD was GPL licensed.
Why do you pipe stderr of du into /dev/null?