One of my admin friends said it’s not really made with desktop users in mind but more for people who need to set up (lots of) computers / servers quite often (= admins). If you’re not planning on distro hopping or reinstalling your system all the time it doesn’t really do anything for you that any other distro plus a good backup strategy already does. Plus you can use the Nix package manager without installing NixOS on the distro you’re on right now, if you wanna check it out.
I wasn’t cool enough to figure out how to “just boot into a snapshot” when I tried btrfs a while ago. I mean I did figure it out (maybe?) but somehow the read/write rights where messed up and the snapshot couldn’t actually boot/I wasn’t able to log in +___+ Just reinstalled the system eith good old ext4. It sounds really cool, though …