The David Chang backed restaurant, Maple, is doing to food delivery what Amazon did to brick-and-mortar book selling a few years ago.  When Maple's first location opened, they were serving 50 meals per hour.  Less than a year later their average had increased to 800 meals per hour from it's then four kitchens.  This year in February they had again beaten that record, cooking and delivering 1,100 meals within an hour.  More info here.