[skrause]

There are Linux distributions which contain almost no GNU software, e.g. Alpine Linux which is built around musl libc and busybox: https://alpinelinux.org/about/

[cryptarch]

WSL is "Ubuntu GNU/NT". You can't base your WSL install off other distros AFAIK.

[yakk0]

It takes a little work, but SuSE can work with WSL too: https://www.suse.com/communities/blog/make-windows-green-par...