And they can't press buttons in the elevator. I don't think any delivery service will take off in a city if people have to leave their apartments.
That sounds hilariously abusable.
Reach out of an open window like a reverse drive-through?
Maybe eventually each apartment will have one or it'll be subsidized by delivery platforms.
Separately, there's a very cool startup called Pipedream that does autonomous underground delivery robots that are kind of the next iteration of the concept.