Building from the previous post of dining options and how the Diner is often crowded or runs out of food on the Empire Builder.....
Take the Coast Starlight's Pacific Parlor Car. It offers sleeping passengers in three sleepers (plus the Trans Dorm Sleeper revenue space) an alternative breakfast, lunch and dinner menu. Don't you think the Pacific Parlor Car on the Coast Starlight is helping to relieve the often crowded Superliner Diner? Couldn't the Superliner Diner-Lounge, operating in similar fashion do the same on the Empire Builder, perhaps even more so?
The same could be done if the Superliner Diner-Lounge was run from Portland all the way to Chicago on the Empire Builder. However, the Superliner Diner-Lounge has some draw backs if it was used like the Pacific Parlor Car on the Coast Starlight. It doesn't offer the best "lounge space" due to 1) configuration of the seating -seating should face out towards the windows, and 2) somewhat smaller windows and lack of wrap-around windows. But would it best be used as a Parlor Car for sleeping car passengers, offering that extra food alternative like the Coast Starlight's Parlor Car, the wine and cheese tasting and extra space for sleeping car passengers when the Superliner Sightseer Lounge becomes full. Mixing the Superliner Diner-Lounge with the Superliner Sightseer Lounge/Cafe and Superliner Diner may cause some confusion. But how to arrange the consist of the Empire Builder so it is aligned at least with the sleepers? Put it next to the Portland sleeper? Not the expert here on that one.
In all honesty, the Pacific Parlor Car on the Coast Starlight largely gets its stock from the adjoining Diner, but it is loaded onboard at either LA or Seattle. Then it is largely just "warmed up" using the Pacific Parlor Car's steam tables it has in an "enclosed area" near the booth seating. I could see the same type of arrangement emerging from the Superliner Diner-Lounge. There's no excuse for the Empire Builder to run out of food - and I know it can!
However, I'll miss the Superliner Sightseer Car along the Columbia River in extended summer daylight hours is this is a nice treat. This won't be as nice with a Superliner Diner-Lounge.
Hopefully there is more to come with the Empire Builder as we see more Superliner cars come into service with the stimulus money.