[hiddencost]

Already safer than delivery vans.

[piva00]

Delivery vans don't start fires on the 5th floor, introducing novel risks for the same result usually is not very well accepted by the public.

But also, I won't ever understand the fixation of the USA about having things delivered by drone, it's a really weird behaviour.

[rsynnott]

Delivery vans rarely hit buildings. And, one assumes, pretty much never above the ground floor.