2 HD Tv's and two old Dell monitors, that could all be replaced with one 4k/5k/8k display if Apple would allow remote rendering of the Aqua interface with graphics acceleration.
Add it to a growing list of things Linux can do that Apple refuses to embrace.
I love to use the macOS as my desktop OS, but these days I find Linux more useful as a utility OS.
Right now I'm running Debian, with two Qemu VM's with PCI Passthough, one for High Sierra, and one for Windows 10.
It works well, but it really has my computer space cluttered with extra Monitors KB's and mice.
If Apple would add the code for PCI Passthough to the macOS, allow OS X to run in a VM, rather than restricting the licensing term to prevent it, and release a tower with PCI-E slots, as well as adding the remote rendering of Aqua in VNC, I'd give my left n*t.