But the headphone jack didn't have a clearly superior successor, and from what I hear, still doesn't. The overall UX (and sound quality) of Bluetooth is worse, not better; it's tough to beat the utter simplicity of plugging in a headphone jack.

The only thing gained is no wires (and maybe some easier water-proofing, not sure). This is such a sideways move, it always struck me as a sign that Apple couldn't maintain Jobs's vision without him.

Right now bluetooth is not an obvious improvement over wired headphones. You have lower audio quality and significant latency unless you spend a significant amount of money, time and have the right technical knowledge to even be able to choose a proper headphone.

These problems don't even exist for wired headphones. Even if you buy the crappiest wired headphone off alibaba you won't find headphones with 500ms latency like your average bluetooth headphone has.

Do you really think the average users know what an "aptX" is and that there are several versions of those of which only the "aptX low latency" version is worth using?

Then on top of that your bluetooth adapter needs to support that same version of aptX too.

Apple may compensate for the delay by delaying video too but for that's merely a hack. It just shows that bluetooth adds more problems that need to be worked around.

It's not an incremental improvement over wired heaphones, it's merely a tradeoff and for me the tradeoff is not worth it.