what about PostgresXL. it is a release v behind Postgres. But it has ACID and cluster. I do not have personal experience with it, but would be interested to hear what folks say.

Overall, I agree -- PG with JsonB is extraordinary powerful system, covering document oriented and typical row-oriented use cases.

PGs ecosystem with external foreign interfaces, and in memory streaming solutions (like PipelineDB) - must be an envy of any other db ecosystem.