I'm not old, but things like this make me go "back in my day we had a CRT with one input, VGA, and it just worked". Obviously we don't have to worry too much about a monitor's supported modes anymore (though that wasn't a problem at the tail end of the CRT), but we're in a period where plugging in a monitor doesn't guarantee that it'll work.
Signal integrity and all that sure, but really it's just a freaking monitor.