>so that, again, you could use the headphones while you charge them.

Yes! And you could charge them off your phone!

If I could dream: wouldn't it be nice if you had headphones with charging cables attached to them so that you never had to worry about losing them.

And phones could have a convenient extra port for plugging such headphones into.

Ah, one could only dream.

There are still wired options, though, right? I don't really miss them, the nostalgia is not strong enough to forget how often the damn cable would catch on something and try to rip the headphones off my head. Or the cord noise. I get that people do not like having to eventually replace a battery, but high quality wireless headphones are a nice upgrade IMO.