[xodice]

Meanwhile I use both a 1080p display and a 1440p display (Both Dell displays) with zero issues on macOS Big Sur.

I get no odd behavior, both monitors are always detected nor do I see artifacting or anything other issue. There was some minor pink lines on the boot up screen that have since been fixed in the latest release. (M1 Mac mini)

I can't really say I noticed a difference personally since they removed text aliasing on 1440p or lower, however it's a single toggle to turn back on.

I get zero mouse lag with differing resolutions and I use both a Magic Mouse 2 and a Magic Touchpad 2.

anecdotes are always going to differ.

[waiseristy]

Might be a difference between the Intel and M1 macs