I'd like to see these "market analyses." According to the RPA, (
https://www.railpassengers.org/site/assets/files/3435/ld.pdf) 70% of the passengers riding long-distance trains are going 700 miles or less, in other words, day trips, or maybe partial overnight trips. Average trip length is 500 miles. At 50 mph average speed, that means the maximum trip time of 70 of long distance riders is 14 hours. Intercontinental airlines have no trouble attracting passengers for 10-14 hour trips flying in cramped airline coach! Why should Amtrak be any different? At least the seats are more roomy, and you can get up and walk around, and you're not trapped in your seat when you're flying over a thunderstorm and the "fasten seat belt" sign is on.
There were 360,000 sleeper passengers in 2018 as compared to 3.6 million coach passengers. (And I wonder how many of those sleeper passengers are redeeming points, as opposed to paying cash.) Seems to me whatever sort of "rail travel experience" Amtrak long distance riders are looking for, it's not some sort of fancy-schmantzy first class service. The vast majority of them are quite satisfied to ride coach, and I suspect most of them don't need gourmet food or white glove service, either. Amtrak is subsidized by taxpayer dollars, and in today's political environment it's a bit hard to get Congress to subsidize a "rail travel experience" that would meet the standards of Lucius Beebe. If they're going to do something like that, they're going to have to find a private contractor who can provide something like VIA's "prestige class." And to do it profitably to the desires of your typical American business, the fare would probably be something like VIA's $7,000 for a transcon ride or possibly more. I think most riders would be satisfied with airline-style tray meals and fares that are usually below $1,000.