EulerOS, a Linux distro, was certified UNIX.

But OS X, macOS, and at least one Linux distro are/were UNIX certified.

IIRC Torvalds uses Fedora.

(Debian for me.)

Remote backup server would be my suggestion.

Configure it with a VPN to talk to your home network and set it up at a trusted friend’s or family’s place.

I do this with a raspberry pi and an external HDD that takes daily/weekly/monthly snapshots, with daily rsync. Works nicely for me.

I’m not a big fan

…

thousands of windmills

I see what you did there.