The problem is not the progress by itself, but the lack of quality of alternatives.
The benefits are small compared to the problems. It really only benefits the OEM, with more space inside the phone. You can always go full wireless if you desire right now.
But, going wireless means there's another gadget you have to charge, more battery consumption on the phone, headphones cost more, and right now, wireless audio is simply not good enough.
It's not an "organic" change. It comes mandated from above.