Strange to see American exceptionalism here.

1. Pizza is good delivery food? For stuff your face mass consumption, yes. But the crust goes either soggy or leathery and it comes with aroma of warm cardboard.
2. Chinese food, possibly, except the noodles get soggy unless they are oiled.
3. Sandwiches, perhaps, but again, originally crusty bread goes leathery, or, if you’ve ordered en masse, the bread gets all compressed.

My vote goes to South Asian and south East Asian foods, basically vegetables, curries, rice, unleavened bread, pickles, yogurt. In Mumbai, delivery from home to office has been going on for almost 5 decades.