I certainly hope future versions of the rMB do not lose the headphone jack. I can tell you that bluetooth really sucks on the MacBook. I installed Bootcamp on the 2016 version of the rMB and updated to the latest Anniversary edition of Windows 10. Just as I expected, Bluetooth through normal headsets is really shoddy at best. I am using the Plantronics Backbeat Fit (which I would think is a pretty good brand for stereo BT). It constantly disconnects and reconnects. I think bluetooth is really unstable - I don't know if it's the MacBook drivers or the headset, but I have never had great success with having a stable bluetooth connection with my systems.