Obviously you put the effort into the Arch one to set up everything with Nix, and didn't do that in Ubuntu. A fairer comparison would be "a system that's actual

Obviously you put the effort into the Arch one to set up everything with Nix, and didn't do that in Ubuntu. A fairer comparison would be "a system that's actually being used to do something" in just Arch to Ubuntu or Nix on both. I'm not a heavy linux user but I know 3 guys who use Arch at work and one of them had an upgrade issue that caused them half a day to fix, this was circa 2016. I know plenty of people who use Ubuntu no issue. Not that such anecdote really means anything, just to demonstrate that they can be used to back whatever bias. > Having a separate system partition by default This is just one simple extra step when you install. And I don't know if arch has this by default? > Even Windows allow you to snapshot and rollback changes just use brfs? This is more of a linux thing has nothing to do with ubuntu