Any reason you didn't go NixOS in a Proxmox VM? The advantage would not be having to do a full reinstall if anything went wrong and being able to spin up other OS' if needed. The downside would be a few percentage of performance loss.
NixOS takes a snapshot on every rebuild, which happens pretty much every time you install something or change a configuration setting, meaning that if I screw something up, generally all I have to do is reboot and choose the previous generation.
Of course I could install NixOS inside Proxmox, but part of the appeal of NixOS is that everything in the system is managed by the configuration.
