Here's (notorious apple fanboy) John Gruber's
take on the removal. I think the most generous appraisal recognizes (1) Apple is for the masses, not the elite (just ask Mac Pro customers), and (2), perhaps consequently, Apple never spent much on making its internal amp/dac more than functional, because the audio cognoscenti are a tiny, though hopefully expanding, minority. People simply don't care about high fidelity audio the way they do about high resolution photographs.
If we grant that apple's internal dac/amp has never been great, it's only a short hop to the conclusion that someone else's dac/amp would be better. The proprietary lightning connector is an added expense, of course, and apple didn't become the world's most valuable corporation by being generous, but if the change pushes our on-the-go rigs to include superior dac/amps, I could see a situation in which the net on-the-go SQ improves. My preference would be a situation in which ANC is included by default (perhaps my jet setting urbanism is a bias) and every headphone has the "good quality, convenient" bluetooth option and the "higher quality, charging mode" Lightning/USBC option. Now, bluetooth today is a POS, and it's incumbent upon apple to use their clout to push for a lossless future codec, but the above universe is not one I altogether dislike. The QC35 has a bluetooth/AUX choice, with a separate USB charging cable. This is a first step, but closing the circle such that wired listening
is the same as charging is needed for this new portable universe to be right with itself.
EDIT: Harmon's
lightning headphone gives me some small hope that AKG will fall into line and give me a lightning N90Q.