[WorldMaker]

Humans have more work arounds in failure cases, at least. Of just the ones I can recall seeing:

1) Sign taped to intercom: "Drive up to window to order". Order at window.

2) Worker standing at the intercom with a notebook and pen and a runner trading sheets between them and the kitchen.

3) "Drive-Thru Closed; Order Inside"

4) Restaurant's phone number posted over intercom.

I'm sure there are a lot more variations I haven't seen. Humans are pretty resourceful when machines fail them but they still want to get paid.