My word. I'm sort of gob smacked this article exists. I know there are nuances in the article, but my first impression was it's saying "we went back to basics and stopped using needless expensive AWS stuff that caused us to completely over architect our application and the results were much better". Which is good lesson, and a good story, but there's a kind of irony it's come from an internal Amazon team. As another…
There was an article not long ago from AWS saying they'll be focussing on cutting cost for customers. Maybe the next step of that process will be pushing their clients off of AWS and telling them to just host on prem.
(They finally delivered 3.10 last month at least)