[Roark66]

Indeed they are for Hdmi. I even saw some claiming to support hdmi 2.0 (4k @60Hz), but I have never seen one for Hdmi 2.1.

Unfortunately despite huge progress with resolutions, refresh rates and ability to use one cable for lots of stuff (usb-c) we went significantly backwards in KVMs. If all your devices speak hdmi 2.1 there are one or two 4way devices that claim 8K-hdmi 2.1 (made by easycoo?), but if you have usb-c or newer displayport devices that don't support passive hdmi dongles your out of luck.

As far as I know there is one device on the market (made by delock) that claims to support DP1.4 (4k@60hz),but it has no edid emulation and there are no pass through edid emulators for displayport 1.4... So every time you switch kvm your displays will act as if they're disconnected/reconnected. If you do actual work on two pcs and you switch a lot that's horrible.

So the tldr is: great modes, but why did nobody think of the kvm users when making those standards (by for example making monitor hot plug detect being able to be disabled from monitor menu?).