Earlier quoted context omitted.
Yes, the main problem with this method is that it is socially unacceptable to split up families and groups while they wait to board and are boarding. I think a slightly less efficient approach would be to somewhat batch up rows. So instead of having all of the people in the window aisle on one side of the plane enter, how about have 1 row of people (typically 3) on one side of the plane. Instead of doing every row at…
Another simple solution would be to board from back-to-front. Right now it's front-to-back: the business-class passengers (at the front of the plane) board first. Economy class boards last and each passenger has to walk through the congestion. Getting business-class travellers to give up their sense of entitlement and board last could be a little tricky, though. I'm sure there's a psychological marketing trick that c…
Also, you can't give up business entitlement. It's built into the price and the passengers paid for it. The entire reason they buy F/J tickets are boarding priority, good seats, better food, newer IFEs, and higher luggage allowances. They also get a glass of champagne or wine, something they wouldn't be able to receive if they were the last to board.
Also a coach and F/J fare is the difference between a $1/pass and $1000/pass profit.