Can see the author's point, but I know people in their late teens who never would have bothered ringing up restaurants to get things delivered. They only do so

Can see the author's point, but I know people in their late teens who never would have bothered ringing up restaurants to get things delivered. They only do so now because its a single app with many choices ... similar to Uber in this regard - they managed to augment an existing service with a cool smartphone app & location tracking.