Preference for MIT and Apache is part of the culture of rust. Also, the lead dev behind Redox has mentioned that he chose MIT over GPL because it makes it easier to contribute, which he felt was important for getting Redox off the ground.
GPL was the most popular at one point. MIT overtook it around the turn of the century, I think.
If you’re looking to try something a little different, I recommend Guix.
It’s based around a nyx-style package manager written in scheme, which is also called guix. There’s an EDSL for writing package definitions. One interesting result about this is that the package manager has a REPL and a dedicated emacs mode
Instead of systemd, the PID1 process is called GNU Shepherd, and is also written in scheme.
Guix also has a strong emphasis on bootstrapping. You can build almost the entire system from source, relying on only a few binaries to start with.
I’ve seen this one and the Michio Kaku one, and they were both great.
I think I remember reading it in the FAQ, but I can’t find it now. It looks like the Redox book used to have a chapter called “why mit” but it’s not there now.