What I’ve always been curious about is if you can help the S3 query optimizer* in any way to use specialized optimizations. For example if you indicate the data is immutable[1] does the lack of a write path allow further optimization under the hood? Replicas could in theory serve requests without coordination.

*I’m using “query optimizer” rather broadly here. I know S3 isn’t a DBMS.

[1] https://aws.amazon.com/blogs/storage/protecting-data-with-am...