This is more of an aircraft related topic than an airline related topic, but the A321 aircraft take a real long time to deplane and reboard. Especially now with the new luggage situation. Have the airlines considered better methods of boarding the plane than relying on a single door? About ten years ago, Jetblue often allowed passengers to board from the rear of the aircraft. I'm guessing that stopped because of security concerns with passengers on the tarmac. An expired thread on this forum indicates the aircraft can be boarded through the 2L door, however, the jetway would come very close to hitting the engine. Would an automated jetway make this more practical? Do any other methods exist?