@Felthry I guess once non-CRT monitors became dominant and it became sensible to move the computer off the desk? Because it can't piggyback off the CRT having a large footprint anyway. :P
Like, maybe CRTs weren't popular into the 90's anymore (I don't actually know but I'm guessing they stayed relevant until the early 2000's) but you could still use an old monitor with your new system.