How is it even physically possible to deliver 400 packages in 10 hours? That comes to 1.5 minutes per package. One cannot do it even if it’s in the same area and every house has a package. Amazon employees already pee in a bottle to save time now they need to learn magic too?
We often get two or three Amazon packages in one delivery. There are easily 20+ packages dropped off all at once in the mailroom of our building most days.