I'm also convinced that we exit the plane in the worst way possible. We basically do it row-by-row: as the people in front of them leave, people in a row get up, get their bags, start walking down the line, and this cascades up the plane. The problem is that there is very little parallelism: while people in the next row to leave are getting their bags, no one is exiting the plane. This is similar to a stall in a proc…
This sounds like it might be faster, and I might like it for solo business trips, but getting on/off with my family is not optional for me. Assuming most multi-passenger groups feel similarly, and assuming solo business passengers represent only ~40% of the population, the impact of such a system (which would require substantially more passenger discipline/planning) would be pretty limited.
If you’re getting off with your family you should just wait for everyone else to exit first anyway unless you have a connecting flight with no time margin or something. Families are super slow to deboard planes.
If your kids are young, you should probably be allowed to board first before other travelers.
A column by column rule wouldn’t apply to you either way.