To be fair, what's going to happen to the drone shipping industry is probably the same thing that happened to the naval shipping industry: we will converge some

To be fair, what's going to happen to the drone shipping industry is probably the same thing that happened to the naval shipping industry: we will converge somewhere at local minima between super-fast and super-cheap shipping times. So I could see how fitting the batteries everywhere in the drone might just work. But at the same time I don't see why no one is yet shaping the batteries for the frame itself.