Hell will freeze over and apes will rule the government (some might say they already do
) before Apple bring the 3.5mm jack back.
Speaking as someone who uses a good mix of wireless and wired cans, I can’t say as I’ve missed it to be completely honest.
The wired cans I most often use with the iPhone have a High-Res Lightning DAC attached to them nigh on permanently.
It really doesn’t hinder my use at all, and it gives me better sound quality (subjectively, your ears will differ) than either the normal Lightning, or the built-in 3.5mm jack ever did.
As for boycotting Apple over a lost cause? Not blinking likely, why would I curse myself by missing out on every other advancement made with the iPhone since last we seen a 3.5mm jack.
Indeed, if the sales figures over the past few years are anything to go by, not to mention general industry adoption of no 3.5mm jack, few people care that much about its demise.
Over the past couple of decades, I’ve grown used to Apple removing, what they consider, old and outdated features. Floppies, CD/DVD drives, more ports than I can remember. And y’know what, I end up not missing them at all. For the ones I still want, however occasionally, there’s an abundance of external options (yes, I have an external floppy drive, tape drive, Blu-Ray, Zip and many more).