I love this because it's exactly the thing that an enraged engineer who is stuck in the last row waiting to get off a plane would create -- just a little naive given airline incentives, couples, families and the limits of human patience :)

I would much rather if all planes had a second staircase at the back, jet bridges aren't needed. That, or let people check luggage for free again so they don't need to manhandle carry-ons.

My guess is that airports also prefer a slower release of passengers -- it means customs lines and bathrooms aren't immediately saturated.