If you get the answer to that one, Mr. Norman, I'd also like to know where the other 11 Viewliner sleepers that are not in daily service are sitting. The best answer I can rationalize with the Viewliners is that "39" is the max number Amtrak is willing to operate with Viewliner sleepers, and the other 11 cars, or 25% of the fleet are just going to float around the system or be in for servicing - not used in revenue service. I don't see why no more than 3 Viewliner sleepers would need to be in for servicing at one time - for periodic maintenance etc. - and then potentially 3 cars as backup - one each in Miami, Chicago and NYC. NYC Amtrak has some leeway to rob Peter to pay Paul. But even at that, it leaves 5 Viewliners in the same boat you pose as above with the Cross Country Cafe's. And I have no doubt that the Cardinal could use an extra Viewliner, as could some other single level trains operating with Viewliners (or did operate with Viewliners) now that the Heritage crew dorms are gone and the crew has to now be stowed in what were "all-revenue based Viewliners."
Here's my best shot at the Cross Country Cafe's:
Cross Country Cafe Cars:
3 - Capitol Limited (maybe 1 as a backup)
3 - City of New Orleans (maybe 1 as a backup)
4 - Texas Eagle (maybe 1 as a backup)
Now that is a count of 13 out of 17 cars?
Course this would likely put three backup Cross Country Cafe Diners in Chicago, which makes no sense.
Amtrak tried using these Cross Country Cafe Cars (aka Diner-Lounges) on the Seattle-Vancouver train (since Superliners are subbing for a Talgo train set that is out of service due to overhaul/restoration), but I heard that bcomplaints were so bad from passengers and crew on how horrible this car was (the Cross Country Cafe) that they put a Superliner Sightseer back on this route (and this is a route that currently just runs with two Superliner Coaches and a food service car (3 cars + engine) to get passengers to/from Seattle and Vancouver, BC.
Amtrak must be running with a shortage of regular Superliner Diners and a surplus of the Cross Country Cafe Cars (aka Diner-Lounge Cars). But it remains to be seen as to what the future has in store for these Cross Country Cafe Cars if you were to ask me - especially if Amtrak already has plans to convert the Capitol Limited to having a regular Superliner Diner after 3 Superliner Diners are rebuilt from the wreck-rebuild line.
Could these Cross Country Cafe Cars be used like the "Pacific Parlor Car" on the Coast Starlight, that is a "lounge" of sorts exclusively for sleeping car passengers in the near future? It would provide space, aside from the Diner for Empire Builder passengers, for example, to partake in the wine and cheese event. Let alone the fact that the CA Zephyr and Empire Builder's Sightseer Lounge car often fills up to the brim with passengers as it goes over the Rocky Mountains etc. This car would sort of help in providing an outlet to packed long distance trains. They could even remove some booths and put in more of a "lounge" type seating that faces out towards the window and inwards to the "aisle" for your viewing pleasure.
However, if this Cross Country Cafe Car can't work on a simple corridor train from Seattle to Vancouver, BC - something is seriously wrong. I did ride the route with the Cross Country Cafe in tow on this route, and forming a line to get your food and then trying to eat your food in a booth without having someone fall into your booth unexpectedly when the train hit rough track or go around a curve was quite an experience you don't get that often on regular corridor or long distance trains. Quite frankly, the Cross Country Cafe (aka Diner-Lounge) I found to be a little dangerous while in operation on the Seattle-Vancouver, BC train.
I think the book remains open for the Cross Country Cafe (aka Diner Lounge) cars. Not sure presently if Amtrak knows what to do with them not that they are basically a complete flop for what they were intended for. Perhaps they are running ok on the City of New Orleans, but if the City of New Orleans added a coach or added a sleeper, would it still be able to function as designed?