I'm a NixOS user and seriously considering at least trying out GuixSD.

Does GuixSD come with Plasma desktop and other KDE assortments? My lazy google-fu is failing me, and the installer video does not list is as option.

I also have an Nvidia Optimus laptop so I assume I'll be using nonguix repo and building non free kernel, but that can be tolerated. If anyone uses nonguix kernel/nvidia, can you please tell me how long of build times I should be expecting? I have an i5 8th gen.