On Wayland it's generally a solved problem (at work I use Sway, with my internal panel - 13" 1080p, at 1.25x scale, and my external panel - 34" 3440x1440 - at 1

On Wayland it's generally a solved problem (at work I use Sway, with my internal panel - 13" 1080p, at 1.25x scale, and my external panel - 34" 3440x1440 - at 1x). Especially with Firefox nightlies bringing native Wayland support, it's only going to get better from here, but it's already pretty good. In Xorg, it's as bad as it ever was, mostly for tech debt / protocol reasons. It can be alleviated somewhat with xrandr hacks, but they're gnarly.