[vasco]

Cost is one of the core premises of the article:

> Top tier SaaS services like S3 are able to deliver amazing simplicity, reliability, durability, scalability, and low price because their technologies are structurally oriented to deliver those things

The whole point is to explore how to drive cost down (due to higher efficiencies in sharing resources) by having multi tenant approach from the get-go.

The point isn't to compare to running your own database on your own rack. It's to compare single tenant RDS with something like an S3-like multi tenant postgres for example.