I don't fully understand all of the USB HID things, but I understand that the standard keyboard device has 6KRO limit, and this mode must be used for interacting with old BIOSes.
The NKRO version can be enabled on some keyboards, but isn't the default on many so they work from power on in the BIOS.
Is there a reason a keyboard doesn't use both? Register the first 6 keys on the simple one, but when a 7th key is pressed that goes through the NKRO?
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