Hm, I knew less about packaging than I thought. I kind of assumed it was mostly automatic updates after the initial package, and only fixing things on major changes.
In the case of Guix, it's just updating the version and the SHA-256 hash. But the bigger issue here is how hard GNU software is for contributions. I can't do patches, because I do not want to jeopardize my email across the internet.
Hm, going slightly ot here. I wonder how long it will take before an 'package maintainer' AI is developed. Imho it won't take long before we see the first semi-automated packager/pkg manager. I think we have all the open source parts, but not the agent network that does the actual work, yet.
With a dedicated package agent, guix and any other smaller distro would be right behind the big ones.