Yes Apple has problems, but don't forget that performance / efficiency sucks when you have an accelerated compositor spanning across graphics cards. On top of t

Yes Apple has problems, but don't forget that performance / efficiency sucks when you have an accelerated compositor spanning across graphics cards. On top of that, most Macs don't have two graphics cards (or even slots to put them in), so you're really spanning across generic USB-C attached HDMI adapters that could be sharing the same bandwidth depending on where you plug them in. In a time when Apple wants to be 120hz HDR retina, that doesn't sound like a high priority for them. That said I sometimes run side by side monitors, and I too would appreciate the pony.