Tbh I still consider Proxmox as Debian, so you’re pretty much there ;).

Same, literaly only have bazzite and android on one device each with everything else being Debian.

Although I have been thinking about switching to Nix for a more robust backup/restore setup.

How quick could you pick it up? And how does it handle one config for different devices (due to different hardware(fstab/cryptsetup differences), propietary/non-mainlined drivers?

I have been thinking about switching because I’d love a reproduciable system but fear it would take some of that flexibility I rely on (I’ve had some issues with ftstab/cryptsetup and initramfs customizations on the fedora atomic base of bazzite on my steamdeck).