I doubt your typical apple user will use the usb port for anything other than charging.
If they are going to improve transfer speeds it's not going to happen in the same iteration they're being made to switch to usb c for two reasons:
- They want to incetivise users to upgrade to a newer model 16
- They will want to take credit for faster speeds. Otherwise people will think usb c is just faster than lighting they were stuck with for years.