As I describe above, the 2000 favelas in the municipality of Sao Paulo are a vast terrain whose expanse and extreme population density are a deterrent to easy policing and even state military action.
Simplified, higher density and more reliable servers make the hyperscale all-flash datacenter more efficient than datacenters based on solid state disk and hard disk systems.
In fact, there are two types of density, according to a recent study by Peter Gordon of the University of Southern California and Sanford Ikeda of the State University of New York, Purchase.