Multiple Displays on a Mac Sucks

So many people I've worked with have used multiple displays - typically a matched pair side-by-side - and sworn by them. At first as a bourgeois indulgence, back when even having a single 17″ display was considered luxurious1, let-alone two displays. There aren't any great options for larger displays. 8k displays practically don't exist - I don't have the physical space to use an 8k TV4, which is otherwise actually the best way to go, and the one 8k computer display I know of is far too physically small for its resolution5. Having to move the mouse across multiple displays just to get to the Dock is untenably slow and awkward. In practice there's a big difference between two windows side-by-side on one display, and two windows on separate displays. I'd rather have a uniform display with lower contrast - like existing 5k displays - as the lesser of the two evils, since that more faithfully reproduces images.