If Apple made an iPhone version with 3.5 jack, i'd throw my Samsung out of the window (literally) in a second. I have no interest to replace my 300euro or so headphones with their Bluetooth garbage.
A 3.5 jack to lightning connect converter cost maybe $5. I have a set of mixed devices, some with and some without a 3.5 jack. I bought a few of these converters and just toss them in the headset cases (of which I also have a few).