Great writeup! I discovered guix a few yearssago and it’s become my preferred OS. I first installed it on my desktop and then my two laptops. The declaritive system config is a game changer. I like it so much I would never go back to a distro that doesn’t support it. The rollback feature has saved my @$$ a few times. I haven’t done any yet but I want to try packaging some software for guix. I think that’s it’s biggest downside, some packages not being availible on any channels forcing users to install via nix, flathub, or something else. In my experience it can add a bit of friction.