Wired headphones cater for these edge cases.
As I say, I can live with a dongle for 3.5mm or serial (despite it being a regression), it's just another straw.
The certainty and simplicity of an audio jack is not valueless though, no matter how many people on HN say it is.
> The certainty and simplicity of an audio jack is not valueless though
Nobody is saying that audio jacks are valueless in general, just that it's reasonable for a mass market device where it has value for a small % of people to not have it.
If a phone would have to cater to all these edge cases we'd still have serial ports on them.