No thanks! A four hour wait at the drive up window because Dunkin' Donuts only has one employee running the shop isn't exactly my idea of fun...
Actually I doubt if you would have to wait very long (unless you happen to be in the car right behind my daughter-in-law who can never make up her mind). Entire system could be automated, drive up, look at the screen of what’s available, push some buttons, insert your credit card, your food comes out one slot with your receipt, silverware, napkins, condiments, etc. are available through another slot and away you go.
In some cases would take a whole lot less people to operate than the way it is done now. Of course there would be no more free drink refills and everything would be “have it our way” or hit the highway. The ability to choose to have a hamburger with or without pickles may become a thing of the past.