Not super common but commen enough and just for a snack, but I like using tortillas if there's no bread in my apartment. I use them for things like peanut butter and mayonnaise wraps and peanut butter and butter wraps.
I also sometimes use tortillas for leftovers in general, depending on the leftovers from the night before. Last time there was leftover homemade mac and cheese and catfish, I heated them and had that wrapped in a plain tortilla with nothing else for breakfast.