With people moving in also the food is brought into the local cuisine. We have a large community from indonesia, Surinam and the Antilles and those cuisines are mingled with ours. The chance a Surinam would eat carrot and onion mash and sausages would be a lot slimmer than us enjoying slow stewed chicken (or even better, Duck ?) with green beans & sweet potato between a very thin buritto ?. Maybe the term "American" isn't the right one, but for ease used, just like any cuisine with other influences isn't just local.I'm not entirely sure what "American" cuisine is. There are a great many regional cuisines and every one of them is refined, in the best sense. When I sit down to a plate of Huevos Rancheros at Tia Sophia in Santa Fé I'm experiencing the deep soul of Southwestern New Mexican cooking and there is something magical about their sopapillas.
Barbeque varies from region to region and people will fight over whose version is better. Chili is a national competition. All of this happens because there is refinement, in the best sense of the word, in the cooking of the various regions of the US.
It may not be served on a silver plate, but I'm not eating the silver plate.
Again, I might not be well introduced in American cuisine, but impressions matter: what I see is like said comfort food, if it's Pizza, cheesesteak, creole cuisine, barbecue or Mexican inspired food. And nothing wrong with that, a road trip from barbecue restaurant to restaurant sounds like heaven to me.