FWIW, i will add that the bulk of effort required to have a pretty user-friendly mouse-centric installer for guixsd is not with the installer itself, but in making a liveISO that boots a graphical environment - i would not consider ncurses to be "graphical" and most casual users would not either - if non-technical people are ever going to try guixsd, then a fully graphical liveISO X desktop environment with a mouse-centric installer will be essential
i have experience with the calamares installer which is very much a ready-made, modular, distro-agnostic solution - all that would be required for calamares is to write a new module that scripts a standard command line install procedure and everything else (the GUI, partitioning, a pretty slideshow) is included for free and maintained upstream - about a year ago i discussed this with rekado and offered that i would be willing to adapt it for guix but it was seen then (as it apparently still is now) to be low-priority, so i left it at that
