One segment I wish came back are bluetooth inear headphones wired together (untrue wireless, i guess).

There are some models but none really explore their possible advantages (battery, ux, single signal source).

I lost single wireless earpiece multiple times making the rest useless. This won't happen with wire. With wire its also so much easier and quicker to take them off they will just hang around your neck. There is reason why many workers in loud environments prefer earplugs wired together.

My impression is that apple hyped the airpods so well that people forgot about other possibilities. And when Google included cool headphones with cables people thought they have to cut them… that was when industry decided its dead segment.