For larger models, replaceable batteries would improve this situation a lot. Of course that would hurt the manufacturers' planned obsolescence strategy.

Not so true. I use a set of “wireless” where the two ears are connected around the back of my neck. (A pair of beatx). These have 12hr battery and I listen a lot. I only kill the batteries on long ski days (the cold probably bring the battery life down a bit).

All my complaints at this point are lack of options in this mostly perfect form factor.

(Better fit in my ears, better sound, etc). This isn’t a wired/wireless problem.

A decent pair can charge enough for hours in minutes. When they about to die, pop one out and into the case, let it charge until the one in your ear is dead or dying, swap them out, 10 minutes and you’re back to stereo for a few hours.