Great summary and spot on! Once you reach that TBs scale Postgres is hard to scale. Yes, you could make Postgres scale to larger scales but it would need deep e

Great summary and spot on! Once you reach that TBs scale Postgres is hard to scale. Yes, you could make Postgres scale to larger scales but it would need deep expertise and architecting and the experience wouldn’t be “it just works”. Ex-Citus here, we had PB scale deployments which needed multiple months of effort to implement and an expert team to manage. Eventually many (ex: CloudFlare, Heap) migrated to purpose built stores like ClickHouse, Singlestore. And not to forget storage costs. Sure there was compression/columnar in Postgres/Citus too - but it didn’t fare well compared to pure columnar stores. (Disclaimer: This is Sai from ClickHouse/PeerDB team)