[wmf]

In theory there may be economies of scale in food delivery if a single driver can deliver multiple orders from the same restaurant. Uber Eats already offers free/cheap delivery when there's already an order out to a given restaurant.

[abvdasker]

It's not theoretical. Uber Eats already does single-origin, multiple-destination batching to squeeze efficiency out of their network (I have a friend who works there). Afaik there are other kinds of batching they have not yet implemented.