[beloch]

There are still a surprising number of motherboards being made with a PS/2 port.

I suspect some motherboard companies have people who still cherish their Model-M's, because support for them seems to be flawless. How many other completely unmodified thirty-plus year-old peripherals can you plug into a brand new computer and expect to just work?

[toast0]

Why would you buy a motherboard without a ps/2 port? They're handy, and there's enough boards with them that it doesn't cost extra.

I think modern cpus include the ps/2 handling in their legacy cruft section, so it's just a bit of signal routing and a connector.

[Symbiote]

A very few businesses with tight security requirements will allow PS/2 keyboards but not USB, for security.