Pre COVID, my spouse and I took Acela from NYP to DC, and back a few days later. Not first class. I had some cafe food and well, I could do a lot better in a small supermarket's frozen section. Not a huge problem but still, even a McD Big Breakfast would have been a huge improvement on the morning ride down.
Also pre COVID, we considered going to Montreal from NYP. Ignoring the issue of making connections from LIRR, the biggest reason - a very long ride, what 10 to 12 hours or longer with little edible aboard the train. It seems to me that actual dining could do well aboard such a train. Regional items in the menu wouldn't hurt. Yes, dining cars are not cheap or plentiful, but this is the closest you get to LD trains without needing sleepers. It would make a train like this far more desirable, IMHO.
Also pre COVID, we considered going to Montreal from NYP. Ignoring the issue of making connections from LIRR, the biggest reason - a very long ride, what 10 to 12 hours or longer with little edible aboard the train. It seems to me that actual dining could do well aboard such a train. Regional items in the menu wouldn't hurt. Yes, dining cars are not cheap or plentiful, but this is the closest you get to LD trains without needing sleepers. It would make a train like this far more desirable, IMHO.