I'd like to have a phone with a better screen and a nicer camera, and I'd even be willing to pay a lot of money for one, but those features just aren't worth the loss of my headphone jack.
The one thing I could see being worth my headphone jack is a folding screen, but it seems like we're still a ways away from those being durable enough. (And if some company does ever decide to put a headphone jack in a folding phone, that's the one I'll buy.)