I just can’t see this ever being common. It sounds terrible. Imagine phoning a number, a person answers and you attempt to relay and negotiate a food delivery order through them, in what world is that better than browsing an app? We don’t have to imagine, this is what we used to do. It sucked and almost everyone stopped doing it in favour of browsing an app. It’s just a superior interface for that sort of thing, it’s already as good as it needs to be.