Originally Posted by
CitizenWorld
If you need to evacuate the aircraft quickly it's far more difficult if there are carryons in the way. It's therefore safer to board in groups where baggage can be more or less stowed in the lockers before the next group comes on board with their carryons. I suspect it'll also be quicker filling cabin segments at a time since you won't have bottlenecks at certain sections with everyone milling in at once. Like I said, safety and efficiency.
I'm talking about different boarding groups within the coach cabin - First or business class and the "lockers" is irrelevant in that regard. I agree that someone who paid a premium for a premium service class has the right to board earlier. My issue is with the fellow passengers in the same service class that I'm in, who may have paid the same or less for their tickets as I have.