The QA part has to do with processes, not technique (Scheme vs. Nix, etc.) I think we (Guix) are doing pretty good with our review process for packages and gen

The QA part has to do with processes, not technique (Scheme vs. Nix, etc.) I think we (Guix) are doing pretty good with our review process for packages and general attention to packaging issues—bundling, security issues, package size, integration, etc. These are practices similar to those of Debian, though I must say Debian remains the gold standard to me. :-) As for GuixSD, you are right that the Shepherd, for instance, is not as mature as systemd (it’s also much simpler though). My comment was referring to packaging QA. I do think that the ability to statically check a number of properties on a GuixSD config before it’s even instantiated (something that using a general purpose language buys us) helps a lot, though.