I wonder if, in the future, stable diffusion or other AI techniques can be used to generate nice icon sets and other UI elements. Not that I'd expect Apple levels of design, but anything to bridge the gap would be nice...I'm primarily a macOS user, secondarily a windows user, and my forays into *nix have always provided a poor first impression. Anecdotal, of course...
I tried using MidJourney to generate exaggerated UI themes (not skins, just general themes for inspiration), but the results were disappointing. They were always gorgeous[1], but my prompt engineering skills couldn't coax it to use space efficiently.