I'm just brainstorming ideas at this time.
Here is an ideal setup
playstation 1 with upscaler - 2 plugs
playstation 2 - 1 plug
playstation 3 - 1 plug
playstation 4 with vr - 2 plugs
playstation 5 - 1 plug
tv - 1 plug
dvr - 1 plug - 8 plugs total
or
nintendo system with upscaler - 2 plugs
super nintendo with upscaler - 2 plugs
nintendo 64 with upscaler - 2 plugs
nintendo gamecube - 1 plug
nintendo wii - 1 plug
nintendo wii u - 1 plug
nintendo switch - 1 plug
tv - 1 plug
dvr - 1 plug - 12 plugs
Not all device would be on at the same time.