Before the HID standard, every keyboard manufacturer needed to write custom drivers. This led to compatibility nightmares. With HID:

Windows 11 sometimes "sleeps" USB ports to save power, which can disconnect your keyboard.

For power users and gamers seeking lower latency or finer control.

Specialized switches, sip-and-puff devices, or eye-tracking keyboards often require custom HID drivers to translate unique inputs into standard keystrokes.