I have also 20 years of Linux experience. XFCE (I love XFCE btw) does not solve this points mentioned. I think you're biased and this are valid points OP mentio

I have also 20 years of Linux experience. XFCE (I love XFCE btw) does not solve this points mentioned. I think you're biased and this are valid points OP mentioned: - nVidia's drivers are poor, and there are a lot of sharp edges. I'm using one of their GPUs. No, I can't switch to AMD; I need it for CUDA, and anyway GPUs aren't exactly cheap. - AMD's drivers are of inconsistent quality, and I couldn't buy a 6800XT even if I'm willing to sell my first-born. Ok, that's also true for nVidia's newest GPUs, and Zen 3, and... different rant entirely. - HDR basically doesn't work. - Mixed-DPI screens basically don't work. - HiDPI in general is glitchy.