Exactly my question. If improving on SQL also means that I have to throw out all the maturity of Postgres, it's very unlikely to happen. But if you can define

Exactly my question. If improving on SQL also means that I have to throw out all the maturity of Postgres, it's very unlikely to happen. But if you can define a new query language that can be implemented by existing relational DBs, you might actually have a shot at displacing SQL.