[zilti]

You found support and documentation lacking? How so? The #guix and #nonguix channels are full of helpful people, and unlike Nix, it has a centralized, comprehensive handbook that covers about everything. Finding Nix documentation was a horrible experience in comparison. Yes, there are more Nix than Guix packages, but that hardly matters to me due to how easy it is to create packages for Guix. Devenv seems more or less like direnv?

[pxc]

Devenv includes direnv integration, but the main feature is organizing development environment configurations using a NixOS-like module system rather than declaring them as packages (simple functions).

Guix (deliberately) doesn't support anything like the NixOS module semantics. 'Services' are its alternative, of course. I don't know if there is a capability for per-project service declaration in Guix atm, but it wouldn't surprise me!