My iPhone 6 Plus just went off contract. As soon as it dies, or slows down, I'm going to buy the best Android phone with a headphone jack. I'm sure wireless headphones are great, but the high cost - not to mention the silly dongle - just doesn't work for me. It's highly unlikely we will ever see a headphone jack on an Apple phone again. Their disdain for going backwards, let alone admitting they were ever wrong about anything ever, spells doom for the headphone jack. I would not be surprised if they don't remove it from all of their products.
While the cost issue is still there, AirPods and the ever increasing competing products really solve this entire issue for me, and then some.
I felt they were overpriced but bought them anyways as a birthday gift to myself. Now that I have them though, I would probably even pay twice as much if that was the only way to have them.
They're the single best 'gadget' I've bought in a very long time and even now, six months in, I regularly have little 'moments' where I realize having bluetooth headphones saved me some (minor) inconvenience.
Furthermore, there are pretty decent bluetooth headphones even at forty bucks these days. I'm pretty sure most of us will end up with cordless headphones in the near future.
I don't think it was smart of Apple to go jack-less before cordless was the norm, but then they often do these types of things (non-removable battery/storage, walled-garden iDevices, etc.).
I know a lot of people who were entirely unaffected by it. The phone comes with a tiny little dongle, put it on your headphones and there's no difference. Hardly what I'd call "insanity" and other manufacturers are now following suit.
You might argue that there's still a problem when using high impedance headphones, but that's not really a concern for 99.99% of iPhone users. It's like complaining that a non-RS Ford Focus is "insane" because it wasn't designed with drifting in mind.
I know several people who have switched because of that insanity.