Same as VGA, shit just works, don’t need to worry about drivers or OS. So if your server shits the bed, you don’t need to worry about these things not working so you can can figure what went wrong.
My keyboard uses PS/2 and although I do have a PS/2 to USB adapter, i prefer using my computers PS/2 port because it means one more USB port can be used for something else.
I'm glad to have it. I have to keep my old PS/2 keyboard plugged into that slot so I can get into the BIOS. My USB keyboard isn't recognized until it's too late to interrupt the boot process.
We asked our Dell sales guy this question years ago now, when they had been removed one year and quickly added back the next year.
They are there mostly for government builds, and other places with high security requirements. Usually the requirement is that they need to prevent any unauthorized USB devices from being plugged in. With the PS2 m&k ports they can disable the USB ports entirely in the BIOS.
Went to Disney recently and had a lot of time to wait in line. I found a ton of old tech recycled into decorations in their Star Wars area. I got to explain circuits, hard disks, and old connectors to my kids.
NGL I literally still use a PS/2 port for my decent yet extremely old membrane keyboard from circa 2007.
I meant to upgrade to a customized mechanical keeb a few years back, got a bunch of sample key caps and switches, got really overwhelmed by the choices, and never bought anything permanent.
In my dream scenario this choice pays off when some fed agency tries to install a hardware keylogger and can't because I'm the last idiot still using a PS/2 keyboard in 2024.