Response is headphone jack is beyond just the use of the bluetooth buds. My work truck doesn't have a bluetooth adapter, a $2 cord takes care of the problem. My parents Subaru when I'm driving them around when they visit does have Bluetooth, but gets angry if you try to connect another phone, guess what? Same $2 cord in my truck allows me to connect in. When I'm working a 12 hour day, headset batteries don't last that long, nor does my phone really. But I can hook up my phone to a battery pack, then have it plug into a speaker by aux, by god it just works.

Bluetooth is fantastic if you go to the same place every day, and every piece of equipment is yours and connected in and auto connects. But those of us that travel it's nice to have a plugin that just works without playing the "Why is it not recognizing?" game.