But that doesn't really prove much does it? You are saying they could rearchitect/simplify the whole thing and move it on site to save money - but what about re

But that doesn't really prove much does it? You are saying they could rearchitect/simplify the whole thing and move it on site to save money - but what about rearchitecting the whole thing and leaving it on AWS? Which part would actually saving them the money? - rearchitecting/simplifying, or changing where it runs? There would need to be an apples-to-apples comparison to be meaningful. That said, I don't believe everything needs to be in the cloud - but maintaining data-centers are also very expensive, and need to be accounted for very differently.