The only thing that being developer hints at here is often that group is often more techie and either would be on wireless or have very strong opinions about their listening setup. But the same is likely true for audiophiles (likely skewing toward the 3.5mm).
For what it’s worth, I’m not arguing for the jack to be gone - just sharing the reception I’ve seen in my network.
The headphone jack issue just seems like a solution in search of a problem. No one was complaining about headphone jacks before, so in a very best case scenario there is no positive impact (you already have bluetooth headphones, you don't mind dongles, etc), but in a worst case scenario they made life measurably worse for users (you don't own bluetooth headphones, you don't want to have to deal with dongles, EarPods are super expensive for headphones; all of these are issues which disproportionately affect the less well-off of people who can't afford the headphone upgrades, which techies tend to not be).
Agreed, removing it doesn't seem like it really gained anything. It was neutral at best and likely negative on the average, perhaps my smaller network that has discussed it just isn't negative and decided to not say anything at all.