All these tech were already obsolete by the time Apple got rid of them; 3.5 mm jack is not such case. I'm not using Apple products, but if I would, I'd be mad that I can't use my headphones anymore and must buy new ones that doesn't provide much/any benefit.
You still can. They even include an adapter in the box. What more can you ask?
This dismissiveness is the reason we need influential voices to speak for the user in the design process.
http://www.prnewswire.com/news-releases/belkin-introduces-li...
But I guess that's par for course for the consumers that clad their fantastically stylish sci-fi pocket supercomputer marvels of manufacturing in neon Croc-rubber.
Users have gone wireless on nearly everything else, and are about to buy more wireless headphones than wired. The dongle is just an interim fix until you switch other devices to matching wireless; we've done it many times before, and we'll do it again.
Users that want cheaper phones so they can pump more money into the accessory ecosystem the functionality back.
You have fun charging 2 or 3 things every few hours and having horrible device interop or none at all with your headphones and other accessories. I'll keep my headphones.
The real goals behind the removal of the headphone jack are DRM, extracting more money out of their peripheral industry, and the chance to make another kooky fashion statement.