A 2-person sleeper car used to cost a bit less than 2 coach tickets on a plane, at the expense of a 66-hour delay (plus another 6-12 hours of actual delays). And it was glorious.
Okay, you didn't always have the time. But when you did, Amtrak was the way to go. That book you meant to read? Done, along with the pulp novel you didn't really mean to read. Side projects? Easy to work on when you're watching the continental US from an observation car with a transparent ceiling.
And the meal cars. I am going to miss the meal cars, which Amtrak was phasing out even before covid because "my generation doesn't like taking to people". But in the past 5 years, those meal cars were the only place where I got to candidly talk with a more or less random slice of the American population. And that's including my cross-country road trips!
You got free meals with a sleeper car, but there was only one dining room and seating was random, so you'd see different people every meal. And you'd just talk, politely, for about an hour with people who you probably would have never otherwise interacted with.
I miss that.
A lot of air travel is completely needless and only done "because we can".