PC World has an article on why USB-C has not been a viable alternative for the 3.5mm audio jack. Problems with USB-C include variable handling of digital to audio conversion, incompatible SOCs inside the cable, and non-standard analog-passthrough. In short, the cables which contain computers themselves are not standardized in behavior and the author's conclusion is that mobile devices must have 3.5mm jacks until the USB-C cable technology gets sorted out enough that they become usable.
(Score: 3, Insightful) by DannyB on Wednesday September 12 2018, @04:57PM
They already have a good reason to take away the headphone jack.
They can sell you multiple expensive other products to replace it.
Expensive bluetooth speakers instead of simple self powered speakers that plug into the headphone jack.
Expensive bluetooth headsets that add more latency to phone conversations.
Expensive dongles and cable adapters which provide a headphone jack. (And possibly latency as well)
And these headsets, speakers and adapters are expensive to replace if lost or stolen. Being expensive is helpful to increase the likelihood of them being stolen.
The lower I set my standards the more accomplishments I have.