I’ll give AA credit, they’ve been much more organized and formal about this - it used to be difficult to blame people when rules weren’t enforced, announcements barely heard, and multiple groups called at the same time.
You can play by the rules wait to be called and then screwed into a gate check or you can gate lice and have a chance.
Recently it’s been a lot more orderly with less excuse to linger.
What SHOULD be done is just not allow any bags on the plane after a certain boarding group and make that clear so if you are in a group that allows bags you are all but assured to have space and if not then either check or out it under your seat
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