I always worry about bundled distributions like this. You're subject to the whims of the maintainer in terms of implementation choices, packaging, and whether or not long term support exists.
The Regolith website puts the full iso front and center (for some reason), but you can also just add the PPA and install one of the `regolith-desktop-*` packages - mostly config with dependencies on gnome, i3, and picom. It easy to drop back to vanilla ubu/gnome when the project goes stale or you find something that doesn't play nicely with tiling WM like Unity editor.
I always worry about bundled distributions like this. You're subject to the whims of the maintainer in terms of implementation choices, packaging, and whether or not long term support exists.