I think the other 99% would appreciate having some deterministic config, and not necessarily even using Nix either.

I'm kind of perplexed as to why no other distro hasn't already supported something similar. Instead of necessitating file system level disk snapshots, if the OS is already fully aware of what packages the user has installed, chron jobs and systemd services they've scheduled, desktop environment settings and XDG dot files, any Debian or Fedora based distro could already export something like a archive tarball that encapsulates 99% of your system, that could still probably fit on a floppy disk. Users could backup that file up regularly with their other photos and documents, and simplify system restoration if ever they get their laptops stolen or their hard drive crashes.

I think Apple and Android ecosystems already support this level of system restoration natively, and I think it'd be cool if Linux desktops in general could implement the same user ergonomics.