I seem to recall that there was a security/privacy concern regarding overlapping the windows of more secure or trusted domains with other VM windows - presumably because it might be possible for the screen information to “leak”. I think it was around 2018? Possibly due to meltdown or spectre bugs - but it might also have been a graphics concern. I can’t remember.
Anyway, is this still at least a theoretical concern? I find myself carefully aligning windows so that my VMs don’t overlap. Is there any potential benefit to doing this or is it just the ghost of Christmas past that I am appeasing?