But if you don't use the USB cable it's still airgapped. It just can be made not to be airgapped.
That would be the same thing as saying that laptop is still airgapped even if it has wifi card installed but you are not going to use it, someone else could still use it.
It's really simple, if there is an option to use a cable connection - most people will use it, so effectively they will made it not airgapped.
Keystone devs only did this because lazy customers complained how slow it is to update firmware
