I use WindowMaker with GNUstep daily, and GNUstep theme for GTK2/3 and QT5.

I don't like these new modern flat themes, they look like a medical prospect from a medicine.

What's most depressing:

https://en.wikipedia.org/wiki/Corporate_Memphis

Any company still rocking that style, including Apple's recent advertising looks woefully out of touch in 2023.

It's depressing, but here's the cure.

https://i.ytimg.com/vi/e57bGfHEHy4/hqdefault.jpg

Perhaps someday we can have a realtime filter from corporate crap style to 80s hacker style, perhaps using stable diffusion.