Well, if your life is going to be dictated by what is available grab-and-go... There's beef in the supermarkets - one could make one's own. There's also pre-packaged roast beef - as in chopped/pressed/cooked/shaved variety. They have KFCs by the dozens, but I don't recall seeing sister Yum brand Arby's anywhere. Though I assume for such a person, Arby's doesn't have roast beef sandwiches either.

Mystifying is the limited selection of TexMex ingredients - tortillas, shells, salsas, etc. It's available, but only one or two items in each category. OTOH, there is almost Hawaii levels of variety of Spam. Go figure. Navy influence?