They might have the ability to do so. The motivation? Well let me put it this way: I tried Amazon’s grocery delivery service, and stopped using it because everything—everything—kept arriving in its own individual bag regardless of whether it made any sense, so it was just a bunch of bags I had to carry upstairs. That bags also had no handles.

So they were optimizing for something, but it definitely wasn’t packaging efficiency.

Optimizing for dollar cost. Human time costs more than the extra packaging.

Results would doubtless be different if they were optimizing for minimal environmental impact or produced waste.