On: Hold off on AWS Aurora and Postgres until further ...

[nolite]

" because the crash is in the underlying storage the MultiAZ setting makes no difference."

@OP - I don't understand this line... can you explain more?

[vhold → nolite]

Aurora read replicas are just compute heads decoupled from the storage. They increase availability and read performance, but don't do anything for the reliability of the storage.

https://aws.amazon.com/rds/aurora/faqs/

"Each 10GB chunk of your database volume is replicated six ways, across three Availability Zones."

So, if there has been a storage layer failure, most likely it was a software bug in Aurora itself.