>>469722
Actually I just looked it up and it seems that USB-C supports the transfer of Analog signal
Also it says that while you can charge the phone usign a spliter, since the headphones use the same pins as fastcharging logic circuitry, you can't use fastcharging while listening to headphones.
Also the charging current and the electromagnetic bullshit around it distorts the headphone signal and it leads to quality loss.
To sum it up, 3.5mm jack is still superior, but since it can be replaced by USB, it will probably continue to die out as time goes on.