Maybe they just never had desktop PCs? Mine has a ps/2 port, various different colored USB type A ports, USB type C, DVI, HDMI, RJ-45, 3.5mm audio, and I just bought a M.2 PCIe adapter card because SSDs have two different popular interfaces. I also have a micro-SD to USB adapter and a box full of just as many cables as I had in the 1990's. Graphics cards now have their own special power connector, as do SATA drives. HDMI comes in 2 or 3 different sized connectors, so does SATA. It's no less of a mess than it was then.
Yea we don't use that but we do use just as many incompatible connectors like most of what I listed. Even M.2 drives have two mutually incompatible connectors which look almost identical. It's easier to tell serial vs parallel port than it is purple vs blue vs black vs green USB-A ports.
Apple has always been good at keeping that clean though, at least for the external ports.
