Fuck it, let's make a cpu-free distribution whilst we're at it.
It's called FreeBSD. HTH. HAND. ;-)
What? Well, it is! It's Linux-free, it has no systemd and no glibc, and no GPL code so it is de facto NU free.
But it has a Linux emulator and can run Linux binaries.
And there is Illumos, which can also run Linux binaries.
If you don't need the Linux binaries part, there are also DragonflyBSD, NetBSD and OpenBSD.
All FOSS, all current, all out there, working, with active communities.
Fuck it, let's make a cpu-free distribution whilst we're at it.