I'm on NixOS since maybe five years and still being unable to digest Nix language and Nix* evolution, not that impede to profit from a functional OS design, it'

I'm on NixOS since maybe five years and still being unable to digest Nix language and Nix* evolution, not that impede to profit from a functional OS design, it's my daily driver, but... I hope for Guix System but so far it's community seems not really more focused than Nix* ones, they are deeply INRIA/HPC centric not much valuing desktops and desktops needs for what I've see and lack of stuff like full LVM support built-in, zfs support does not help much, so so far I judge it not much mature enough for my desire. Guix docs are far better than NixOS ones, however there are no "books alike docs" from zero to sufficiently acculturated in Guix/Nix witch is a big issue IMO. However they are undoubtedly the future, there is no other sustainable model for the modern world but them. Modern container-mania can't scale down to system level and it's not much better than full-stack virtualization on x86 few years ago, a current fashion with no valuable technical reasons to be, modern packages manager around them (like snap, appimage, flatpack) are just crap needed to push commercial crap in FLOSS world, sorry for being rude, but that's is. Just look at their repo (including things like naming them store) how outdated they are in bundled deps, how many holes punched around they "security by isolation" model to make them usable and still they can't scale. Classic package managers came from another era, are in use, but not much sustainable anymore so...