I would use, Datomic for revisioning, horizontal scaling, and flexible schema (whilst still being relational) Clojure(Script) for the ability to use same langu

I would use, Datomic for revisioning, horizontal scaling, and flexible schema (whilst still being relational) Clojure(Script) for the ability to use same language front and back, for it's very good interoperability CSP and expressions Datascript for my client side database, I'd probably try and achieve a real time app based on something like hyperfiddle