And long may it last, there is no way to truly replicate a ps/2 port/header with adapters etc

Hopefully if they ever go away for good someone makes a pcie ps/2 card with proper interrupts (if that is even possible behind abstractions like MSI) rather than converting ps/2 to usb

IIRC PS/2 ports are actually an extreme overclocking feature as they are more likely to continue to function at borderline stable clocks.