You must use iTunes to back up, via cable, right?
To be honest, I don't know if my significant other's phone (iPhone 11 Pro) can even connect to my car anymore through the cable. (Bluetooth being the only other option - which has significantly worse audio quality and issues like static or something of the sort)
Upgrading OS is the main source of frustration and time wasted in my pro-audio world. So I salute you - iOS10 survivor!
Note - listening to audio in cars, it's a compromise. It's never ideal, so I wouldn't sweat the quality - but you're right to question the reliability.
Use the good old, eco-friendly, headphone jack!
(All consumer wireless is ONLY instigated by Apple because it is cheaper for Apple, but consequently a poorer, less eco, experience for the world)
I’d rather they stick with lightning.
If you do, but want to switch to wireless carplay, there are adapters: https://cplay2air.com/products/cplaystreamer-wireless-adapte...
That said, I think Apple will offer both lightning and portless iPhones during the transition. They might make the "mini" phones be portless for example.
But for some reason Apple has never brought this support to the iPhone's lightning port.
The most generous outcome I can see is Apple ditching ports on the iPhone and Mini, and moving the Pros to USB-C.
On the one hand, yeah, USB-C works great, and everything else I own takes it. On the other hand, Lightning also works great, USB-C isn't an improvement on the merits, and iPhone users have a bunch of accessories for it. Like in my car, I have a 12v charger with one USB-A port and a built-in Lightning cable, and I'd have to either junk it or just ignore the built in cable if they went USB-C.
I'm pretty sure the writing is on the wall with MagSafe: Apple intends to ditch the port entirely. That makes me nervous, frankly, and there are people out there who use an SD card reader who would be furious.
But I think that future is more likely than one in which Apple ditches the Lightning port for USB-C. We'll see.