Given that PS/2 keyboard/mice are electrically compatible and just use a different protocol, imagine how much better the PC could have been for the entire 90s if they'd just bothered to write some code to make PS/2 port firmware autodetect which one they're talking to. You could have just had PS/2 ports, no need for keyboard + mouse
@foone Weren't there some laptops that shipped with a combi keyboard/mouse PS/2 plug? Or maybe I misremember.
@shrekonsec Yeah. Laptops often did that, because they only had room for one PS/2 port. You could also get a Y-splitter and do both
@foone @shrekonsec Quite a few (not-anymore-so) recent motherboards do the same.