[meddlepal]

Clients no, but if you have had a Postgres DBA optimize your database to take advantage of known Postgres storage backend behavior you may be in for unexpected performance degradation under the assumption "it's just Postgres".

That said, I dust that's pretty uncommon.

[scarface74]

Well, you get the same problem if you have “network administrators” who took one AWS certification and call themselves “AWS Consultants”.

In both cases you end up with suboptimal solutions. The lesson to learn is not that AWS shouldn’t be making storage optimizations, it’s that you don’t depend on a bunch of old school net ops “lift and shifters” who didn’t take the time to learn the environment and who think that the cloud is just an overpriced colo.