Teams outside Infra aren't allowed persistent disk. Service authors get to pick from a small catalog of managed operational storage systems. Life would be a lot easier if a scalable Postgres were one of them, but it isn't. For the moment, the offerings with high scalability and good SLAs are all KV stores.
We do have ES but it's operated for log search, not production critical paths.
We do have ES but it's operated for log search, not production critical paths.