The main difference with NixOS is that it’s fully free. Another difference is that the language used for configuration in Guix is Scheme, a general purpose functional language.

GNU Guix System, using GNU Shepherd as init. It does its job quite well.

I’m in my late 20s and started with ms-dos too. And even tried OS/2 to check I wasn’t missing something before upgrading to 3.1 then XP 😂

You can try Speed Dreams, it’s fully free and great ;)

I can only recommend Guix system 👍