I agree that the single biggest improvement in airline boarding should be with the airplane and airport design. The fact that there is only one entrance/exit m

I agree that the single biggest improvement in airline boarding should be with the airplane and airport design. The fact that there is only one entrance/exit makes for an automatic bottleneck and limits options. Most planes are equipped with a rear door or on larger planes a mid-door. They should allow those doors to be used during boarding. Seems that this would be the most cost efficient and reasonable gains should ensue.