Dongles suck. Dongles are a work around to a problem that is created when the manufacturer decides that including the necessary ports, they will not, requiring you to have additional pieces of hardware.
I get that there's a time and place where Dongles are the only solution to things, but with regards to audio ports, Dongles make little sense considering there's a universal standad port available,t hat is ubiquitious, and can be made to fit in extremely tiny spaces while offering full featureset that was looked for.
There was zero technical reason for removing the jack. it was already evidenced, while crudely by the guy who modified his iphone and re-added one in the same spot. there was no real physical hardware in the way preventing it. the jack can also be made waterproof.. So this was not a factor for it's removal. even "thinner" isn't an excuse here because the Jack is found on smaller/thinner devices.
seriously we have enough adapters and dongles in our lives. Why are we cheering on adding another when it was not technically a requirement? I get it. You like wireles over wired. in many situations so Do I. but as mentioned, the jack didn't need to be removed for wireless option. Removing the jack however removes compatibility options from those who use wired devices across number of different audio equipment. And when we voice this, we get nothing but excuses from those who essentially say "I'm happy this way so **** you"
Ultimately, it's consumer teech. Apple isn't going to likely re-add the 3.5mm jack. They're also now rumoured to remove the adapter from the box, further cementing that, if I want my "voice" to be heard. Speak with my wallet. I will NOT be buying any phone that doesn't have a damn good technical reason for removing it. And while I might just be ONE buyer going elsewhere, if companies keep poking their user base like this, its very possible to drive ENOUGh people away to actually start to be noticable.