Except on the NEC? Or do you believe that all those that stopped flying reducing the demand on air traffic on the NEC are not taking trains? But anyway that is not LD so irrelevant here.
I think people only started flying on the NEC because the roads there were so crowded (...which they still are). Those are crazy short distances to take an airplane.
I have no idea why Amtrak does not consider giving stopover privileges at least for a limited number of them, perhaps even charging a small premium per stopover.
