also throw in externalities like nearby construction, speech disorders, music with lyrics or radio shows, 2nd or 3rd language speakers using english improperly, or just plain stupid and bizarre behavior. not to mention it gives your competitors an easy marketing opportunity, 'real human servers' could become the new fresh not frozen.
mobile ordering would add a lot of convenience, but it's also very frustrating to see so many services become tied to the assumption that you have a phone & more or less inaccessible without one.