i'm working on convincing my organization that doing multi-region replication with postgres as a datastore is a bad idea and that we should really be using cockroach. i found in the datastore selection docs where it says that postgres is recommended for single-region deployments and cockroach is recommended for multi-region deployments, but it'd help my case if i had some verbiage that said "relying on postgres replication is unsupported and generally a bad idea and you should really be using cockroach if you're doing any sort of multi-region deployment." does that exist somewhere?