Those aren’t even close to all.

Here’s a couple more i can think of right now (following your pattern of only base distros):

LFS, Chimera, AerynOS, Alpine, Gentoo, Guix, NixOS, Slackware

No, it does not.

Because it uses the XCursor format, which is a quite old standard. Getting apps to switch to a newer standard that has vector graphics is already hard enough. Getting them to do so without burning your GPU is basically impossible.

or

nh os switch .

if you’re feeling fancy

The other way around, but yes.

The main difference is that Libreboot is deblobbed per default.