Yeah this smells like promotion oriented architecture. I have a hard time believing that a logistics company that built DynamoDB and uses it extensively can mak

Yeah this smells like promotion oriented architecture. I have a hard time believing that a logistics company that built DynamoDB and uses it extensively can make it work but uber cannot. The 6m in savings does not properly account for things like ramping up new hires on some custom database, maintenance (what happens in 5 years when whatever language you wrote it in needs to be upgraded to a new version, or some dependency), and a host of other things. Yes the cloud is expensive, but the entire point of it is that you are offloading all of that underlying maintenance/feature work to a team that only does that all day every day and is very good at it.