Isn't this tacitly assuming that Apple will be able to single-handedly eliminate the headphone jack? I think it is quite likely that post-Jobs Apple has finally overstepped it's bounds, and despite it's good qualities the iPhone 7 will be a relative dud. In which case the iPhone 8 will (reluctantly) put the jack back.
I just don't see that happening. To be completely honest, literally 0 of the people I know with iphones have anything other than official Apple headphones. Even when they break, they go into an apple store and buy new ones. There will be lots of complaining, but for most people this won't change anything except the annoyance of not being able to charge while using the headphones without an adapter (which is the only…
Those who use different headphones are largely already using Bluetooth or care enough about sound quality that they bypass their iPhone's DAC and/or amp and use a portable DAC/amp instead.
The remaining affected crowd is relatively small.