Looks nifty— basically it's the "let me try that in a container first" except on your live system with no setup to get it going.
That said, as a NixOS user for the last year or so, I think I've gotten a bit spoiled by just not worrying about this kind of thing any more— eliminating the filesystem (other than home and var) as a big ol' chunk of globally mutable state is so liberating.
That said, as a NixOS user for the last year or so, I think I've gotten a bit spoiled by just not worrying about this kind of thing any more— eliminating the filesystem (other than home and var) as a big ol' chunk of globally mutable state is so liberating.