I “upgraded” to a new Pixel last year because I thought the battery on my old 4A was getting wonky (and I have not had good luck with doing battery replacements). At the time, I did not know (enough) about the Fairphone, and I could not find a new Pixel with an audio jack (maybe I didn’t look hard enough?).
I’d like to go back to having a jack. I do have one scenario where I want to use well-fitting BT buds, but I can do that on any phone. I want wired buds that I don’t have to charge, can switch between devices in 0.5 second, without interacting with any software, and don’t have misbehaving touch controls that trigger when I brush my long hair back behind my ear(s) or shoulder(s). In fact, I still have a set of completely dumb buds that I use for my work laptop that I’d love to be able to use with my phone – don’t need noise cancelling or controls of any kind. I really hope that I can find a phone with a jack next time I do an upgrade. I don’t care if it is thicker, I’m gonna stick on Otterbox (or similar) on it anyway.
I was also concerned about security, but full-power BT is fairly secure now. No one can “drive-by” and monitor or replace the audio; they have to get you during “initial” pairing.