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: 2) by urza9814 on Wednesday September 12 2018, @02:25PM
I like that idea with one change -- don't make it connect with a "slight" indentation; make it a LARGE indentation. Large enough to fit a 3.5mm jack. Large enough to conceal or at least hang on to the adapter that most people are going to be using anyway. Then just include that adapter with the phone itself as a removable module.