Wow. “Mega threads” are exactly how reddit buries away news they don’t really want people to see or care about.

There’s some amount of spill over from the kind built into glasses, but almost none on the kind that hook over and rest in your ear. They also make a kind that sort of clips onto your ear, but I haven’t tried that style.

You know they make gobs of different “open ear” earbuds. It’s what I use most of the time. No bone conduction needed. The speaker is just positioned close to your ear hole. They also make glasses with em built in that way.