I'm an android user, but have owned iphones in the past. Although I have no plans to switch back to iphone, I would happily do so if they put out a more compelling product offering than I currently have. With the removal of the 3.5mm jack, this will never be the case as long as other manufacturers include one. I am a big consumer of music and constantly have earbuds in when on the move.
While I don't disagree that the future may be wireless, we are not there yet. I use both wired and bluetooth earbuds/headphones and the wired are my preferred choice by a long shot. Having a 3.5mm jack doesn't preclude you from experiencing wireless listening, it just gives you an option to choose how you want to experience your music.
Apple say that the jack is past it's use by date. The reality is that, as it stands today, wired listening provides higher quality audio reproduction than wireless.
And, no, providing a dongle adapter is not the same thing as keeping the jack.
ps. And for those who say that bluetooth in cars is the obvious replacement for the AUX cable ... not everyone in NZ can afford a new(ish) car.