I mean, all the phones I've ever had (including my current Samsung A52 from a couple years back) have a headphone jack, but I haven't used anything wired in around 6 years.
I just find Bluetooth to be much more convenient and a nicer experience. I even bought a Bluetooth adapter for my desktop so I could use the same headphones there.
Not to mention, I just looked and there are plenty of phones with 3.5 mm jacks on the market, so it looks like the option is still out there for those that prioritize such a feature.
I think all food packaging should be standardized and reusable, with a deposit system similar to reusable glass drink bottles (at least in Germany).
For instance: All the cereals should use the same returnable 'cereal box'