As per title, I am mind-blown by the speed and stability of NixOS on this “relic” in IT terms… On this machine i tested:
| Distro | Performance |
|---|---|
| Fedora | MEGA slow |
| Ubuntu | OKish |
| LDME | Fast |
| Debian | Fast |
| NixOS | VERY Fast |
And the best thing is that I can bring this config with me on any computer! Oh boy, I think i have fallen in love with NixOS

Once you are comfy with base configs. Simple flakes become a dream simplifying your configs especially helpful when your using nix on more than one computer.
Vimjoyer on youtube has a bunch of vids that really helps and he keeps it simple.