I've had a passing curiosity about Guix, so it was good to read this report.
One thing I didn't find is Guix on servers. I am all-in on NixOS for both my daily driver desktop and couple of servers, and adding more of either will be simple modifications to my flake repository. I really appreciate that simplicity and consistency. Does Guix offer that?
The other thing is package availability: it's amazing on Nix. Plus, they remain relatively fresh on the unstable channel. How's that on Guix?
Guix on servers is ok. I run Guix in my homelab.
The vast majority of what you’d want in a Guix server can be found in the services section and parts of the documentation that lay out how to build services. But it doesn’t have as many services available as nix.
For servers you might want to try 'guix deploy':
https://guix.gnu.org/manual/devel/en/html_node/Invoking-guix...