I agree. However, the current demographics may negate historical precedence, theoretically. Only time will tell.
I believe, the pressure from the ME3 is a good thing for the U.S. Legacies. Competition breeds innovation and dynamism. They will step up to the plate once they consolidate and solidify their structure after the recent mergers. Delta got a head start hence the notable progress. AA still doesn't have single list. UA, well, you said it best...