I still have a 6s with a headphone jack. I don't use headphones much, but do plug it into our cars (admittedly not as much of an issue lately). One has no blu

I still have a 6s with a headphone jack. I don't use headphones much, but do plug it into our cars (admittedly not as much of an issue lately). One has no bluetooth, one has incompatible bluetooth. Neither have USB input. Both are likely to last at least ten more years. One adapter per car is not going to be the end of the world, but it is an annoyance.