Earlier quoted context omitted.
Royally disagree with the headphone jack. That is a huge issue that I don't ever see an end to. You never know when you need a headphone jack and there is no realistic way to carry an adapter all the time. And that is even if I'm willing to buy $100 worth of worthless adapters and do my best to sprinkle them out in my life. Friends car? Stereo in the summer vacation house? Buying bluetooth headphones doesn't mitigate…
Many stereos and cars should accept Bluetooth connections by now, so I’m not sure what the problem is.
2. Bluetooth is pure crap, the UX for connecting and managing temporary devices is absolutely insane on all devices. This is something you do on your own car but is a major hassle to setup for temporary occasions. And hardly something that is done on a whim just to demo something. It is just that bad.
And this is even before considering compatibility issues and security issues, of which there are plentiful. And cars also have this habit of trying to harvest all your contacts etc. (Wonder how many contacts are floating around in rental cars... sigh)