Only one item can be delivered at a time. It can’t weigh more than 5 pounds. It can’t be too big. It can’t be something breakable, since the drone drops it from 12 feet. The drones can’t fly when it is too hot or too windy or too rainy.
You need to be home to put out the landing target and to make sure that a porch pirate doesn’t make off with your item or that it doesn’t roll into the street (which happened once to Lord and Silverman). But your car can’t be in the driveway. Letting the drone land in the backyard would avoid some of these problems, but not if there are trees.
Amazon has also warned customers that drone delivery is unavailable during periods of high demand for drone delivery.
The first thing you mentioned has nothing to do with fuel, which was OP’s original argument.
As for the second thing, I’ve already said I agreed with OP.
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I’m okay with being wrong. Check my comment history if you’d like in which I happily admit I’m being corrected.
But you didn’t say “depleted” or “out of fuel.” You said “broken.” And that’s different.
Can you admit that you misspoke, then?