TL;DR there was a backdoor found in the XZ program. All major distros have been updated but it is recommended that you do a fresh install on systems that are exposed to the internet and that had the bad version of the program. Only upstream distros were affected.
Meanwhile non SystemD systems like NetBSD FreeBSD OpenBSD are safer.
You can have a nefarious developer working for a nation state infiltrate the supply chain for ANY OS.
You don’t know.
Agreed
That is not really true. If anything they would be easier to infiltrate
What’s Wayland support for the BSDs like?
https://docs.freebsd.org/en/books/handbook/wayland/