Use of obox2 and AWS S3

Hi

Has anyone used or is using dovecot obox and S3 storage? I see very little chatter or documentation on it.

Interested in how mature it is and technical items such as high availability and region replication.

I'm guessing that multiple updates to a S3 mailbox is mitigated via the standard dovecot pattern of Director pointing multiple user sessions to a single/common dovecot node.

And for disaster recovery - that's out of scope of dovecot and more reliant on S3 replication?

Any one running a dovecot solution within AWS in general? Interested in best practice for the storage layer. Although NFS is possible its not really optimised for elastic cloud type hosting.

Thanks Raymond