Technology

I think people who dislike the headphone jack must be young and not have (good) wired headphones.
Older people (older than teenagers and young adults I mean) often have a few pairs of good headphones they got over the years, and it's a massive waste to just throw them away and buy wireless because that's what the trends demand. And in most cases wireless won't sound as good, because the budget needs to go to bluetooth chips, and dacs, and batteries and all that crap, instead of just focusing on audio.

According to Wikipedia, 'The original 1⁄4 inch (6.35 mm) version descends from as early as 1877', and it's been an industry standard since then.
You can use it not just for headphones but as a line out, to connect all kinds of audio devices between them. You can hook up your phone to a car audio system, an old radio (if it has input, I think most do), a guitar pedal or an amplifier, a reverb or an effects unit, etc., just with the "magic" of wires.