degen I've reverted my desktop Intel drivers to the version you noted above, 22.20.16.4836, and will try that for a bit to see how it feels. I think I was on a 21xxx version before Windows auto-updated me to 27.20.100.8682. I've never LOVED any display setup on this machine and think I'll probably just add an old Nvidia card to it eventually and/or revert it back to 2015 LTSB to try that out (currently I'm on 2004).
One question: should I be leaving all the Intel graphics settings at default? I think I read someone somewhere that was saying once you try using the drivers for color/gamma correction or any of that, that engages the advanced drivers features like dithering et al.