I think it is underappreciated how much delivery apps are going to change food production and consumption, specifically via the mechanism of replacing expensive retail footage with relatively cheap industrial kitchens running multiple brands across all the apps.
Did this happen though? I'm not sure food travels very well over long distances (long delivery times). Theoretically, you get a benefit to locating a large kitchen outside the city, but I'm not sure prepared on-demand food scales all that well.