Same thing as my main laptop: NixOS + Plasma desktop.
I barely see the desktop TBH. It is there just so I have convenient control of peripherals. 99% of my time is in Web browser or Emacsclient or Terminal. On GPD I use the browser even less, because its purpose is to be a lightweight mobile terminal. Graphical Emacs is just superset of terminal one, so it is preferred is all.
I have one, but coming from a tiling wm, and Vim I have a hard time imagining using it productively. It is in my sell pile.