I’ve tried using wireless charging in a friend’s car on my iPhone SE a few weeks back.

Result: notification that charging had (!) to be stopped at around 50% due to overheating and was poised to continue once the iPhone had cooled down sufficiently. It never continued as that was all I needed to know about the current state of wireless charging with light usage on the side.

Good point on the wireless listening and ear pieces needing a battery as well, though. I guess with those it comes down to convenience for most buyers.