I think the important thing that did not come across very well is that "wipe and reinstall" with nix is so incredibly painless that doing it is even an option. The same would be very very painful with other distributions. A clean reinstall of your whole system with nixos takes maybe 30 minutes. Compare with the average "my Ubuntu upgrade failed" debugging session...
Yes, and speaking of… the fact that “generations” are a central feature which allows seamless rollbacks to previous system states means that if your upgrade fails you’re hardly ever more than a few minutes away from a functional system again.
