Tl;dr: Automatic updates on my home server caused 8 hours of downtime of all of renn.es’ docker services including email and public websites
To me, this is only one of the few advantages of immutability. I have already used nixOS on a server and I really didn’t like having to learn how to do everything the right way. As for distrobox, to me it sounds quite like an additional failure point: it is an abstraction over the containers concept that hides the actual way it is done from you. I’d say if you run an app in a container, go all the way: make the container yourself. To me it just sounds like a bad idea, and I didn’t really like distrobox when I tried it. I just want to say that both of these concepts (immutability, distrobox) would be great if it was perfectly done. But the learning curve of nixos and the wackiness of distrobox drove me away.
The learning curve of NixOS is also what keeps me from trying it out, hence I prefer the “take it or leave it” mantra of the immutable fedoras, and try to keep the amount of packages I have rpm-ostree layer on top minimal.
As for Distrobox, yes there’s ways it can fail, altough that happened rarely to me. What happens mostly is that the distro inside distrobox goes kaput because that’s just what mutable distros beared with a plethora of questionable tooling installed with “curl something | bash” does. But for me that’s the point of distrobox: separate all that shady cruft one may need for work/developing/etc from the host os. It’s a place for messing about without messing up the computer and with it the bits that need to keep working
