Given the direction that the Nix project is going, I suspect that many of you Nix users reading along here are currently considering alternatives, and among them Guix.
Personally I've only been using Nix for a few weeks, so my investment is not that big, but how about you? For a technical comparison, you could start with these two articles. If you're on IRC, I'd also suggest to join #guix just in case or look at the other communication options they endorse on their website.
What gives me the most thoughts is the availability of recent-ish software on Guix; but given Guix's FSF-level copyleft culture there's at least the certainty that whatever efforts I might put in to build and package things myself would have the lowest-possible likelihood of suffering corporate/fashtech capture. And we may be picking up momentum to collectively alleviate those problems.
i didn't. i think there's a steam package on the channel mentionned (guix gaming channel).
i haven't steamed in quite a while (focussing on my professional nethack career currently) but i have no doubts this still works.
people tend to dismiss guix for not being tainted with proprietary shite, but time will show that this will remain the main advantage over similar solutions