You make it sound like an Ikea package.Who the bloody hell wants to carry an adaptor around just to listen to music? Another thing to loose, another expense, a pointless transition away from a standard port.
Dropping the headphone port would have to be one of the stupidest ideas ever. Not only would this be a very poor move in environmentally, but an expensive and pointless one. The iPhone is more than thin enough at the moment, so why not offer people the choice of a 3.5 mm jack and bluetooth headphones and lightning headphones?
Bluetooth headphones are just another bloody thing to keep charge and another drain on the iPhone's already semi dismal battery life.
I hope this remains a rumour.
You don't have to "carry it around" at all, I would imagine the adaptor will be well designed and discreet and will simply live attached to the 3.5mm jack on your headphones.
Picked up your headphones to take out with you?
Great, you just took the adaptor with you too.
Plug them in and enjoy whatever it was you wanted to listen to.