I just bought some snacks at an airport store that was “fully” self-directed—swipe your card, walk through the gate, grab your stuff, and walk out. Except it re

I just bought some snacks at an airport store that was “fully” self-directed—swipe your card, walk through the gate, grab your stuff, and walk out. Except it required _more_ human assistants than a typical airport convenience store in order to handle the volume of confused and suspicious shoppers. “Wait, how does this work?”, “How do I get a receipt?”, “How do I know it won’t over charge me?”, etc.