Personally I still find it a bit hostile to not have the jack available, since often times I find myself charging the phone and using the headphones (when watching videos for example), so having an adapter dongle for such a frequent task seems counterintuitive to me. I believe that if a device is correctly designed, then it should serve most of its usecases without the aid of an extra adapter. These should be reserved for edge cases.
Moreover, I use headphones for a good part on my day and I am not sold on the idea of having a wireless device next to my brain for such an extended amount of time. Sure, we are already exposed to a good number of electromagnetic radiations, but this one I might want to pass. Not to mention the need to charge yet another device.