I’m fine with the dongle because all I ever use the headphone jack for is for listening in my car (no bluetooth), so the dongle just stays on the end of the aux cord in my car.
No dongle would obviously be better, but it’s a very minor inconvenience for me,
https://www.youtube.com/watch?v=35PUIhDUFZo
Very relevant.
Basically, it’s a combination of new foods and exposure to new bacteria.