Given that the new iPad has type C I assume that's the future for iPhones as well.
or you can connect wirelessly.
You don't need a cable at all, because they connect over AirDrop.
Speaking for normal people, though, how often do they turn over their devices and peripherals?
When I bought my laptop over a year ago, I made sure it had USB-C/TB3 from a future-proofing perspective, but I have yet to actually buy any device that connects to it via USB-C, and I don't foresee myself buying many either. On the other hand, I still have a ton of older devices that are USB-A that I still use.
Even when it comes to USB keys, I still prefer USB-A, because it's more than likely that I'll need to connect it to a device that doesn't have USB-C.
I do have some mobile devices that charge by USB-C like my phone, but I still charge them off of USB-A power sources.