If you own a pre bluetooth-audio vehicle and you commute, then you need an aux port. Even early BT vehicles had iffy connection issues that are immediately solved by just plugging in.
Roadtripping and someone else wants to play a quick song? You can go into the touchscreen settings and go through linking the phone to the vehicles bluetooth and selecting that device, or you can just pass the cord.
Bluetooth is still fucking ass for almost everything. I have a new car, but still plug the phone in with a wire. With USB-C you can both receive and transmit audio with decent quality and it also charges your phone!