Something of a misconception here: AWS doesn't use any of their code. They wrote a bolt-on layer above Aurora Postgres that aims to mimic / clone the semantics.

Something of a misconception here: AWS doesn't use any of their code. They wrote a bolt-on layer above Aurora Postgres that aims to mimic / clone the semantics. It's like running a windows app on Linux via WINE: it sounds cool and then you realize it's going to be a world of pain.