

No, I don’t think not being able to make change or not stopping touching a screen no matter how many times you are told that it isn’t a touch screen is cultural momentum. I genuinely think that we the older generations have failed Gen Z at a common sense and problem solving level and I very much hope that we don’t keep failing Gen Alpha. I was in school still when no child left behind went into effect and the difference was stark. It was said then that it was designed to create a generation of Republican voters and based on the most recent election it looks like it might have worked.
The other commenter is on the right track but the chip controls both USB and PS/2 as well as others;
In the 90s and 2000s, for x86 machines, slower I/O was handled by a chip called the Southbridge which worked in conjunction with a chip called the Northbridge that handled faster I/O like IDE and PCI. Later these were integrated into a single chip and, as of recent processor generations, into the processor itself.
AFAIK ghosting and key rollover are issues when using PS/2 but it can offer some milliseconds off latency when used in high cpu games.