As the IT person for my company, I order all of our cell phones and upgrades. Most of our people have opted away from the iPhone now that they no longer have headphone jacks. It really seems to have struck a nerve with people. Personally, I feel the same way and can't blame them.
Initially, I thought the removal of the headphone jack would not be such a big deal for me.
However, I have a usage pattern that really suffers from the removal of the headphone jack:
Quite often, I want to listen to music in bed, before I fall asleep, using my iPhone 7 and headphones. And quite often, my iPhone's battery is at 20-30% late in the evening.
So I'm faced with a choice: 1) plug my favorite headphones in the lightning port via the adapter, risk falling asleep and waking up to a dead battery (or not waking up, as I rely on iPhone's alarm clock), or 2) charge the phone and skip listening to music.
I hope there'll be dual adapters soon (in addition to the Belkin adapter that in fact requires me to use two adapters, which I find hilarious) or B&O makes a BT version of my favorite headphones.
And yes, I've considered a bluetooth receiver where to plug in my headphones, so I can charge the iPhone via lightning and listen to music via bluetooth at the same time, using my wired headphones. But that means an extra device, extra cords, and extra inconvenience.
In their courage, I wonder if Apple gave enough thought for music listening scenarios? It's a bit ironic considering that they did wish to improve the music experience by remaking the Music App.
Some nights I miss my iPhone 6S.