If by datalog with Clojure, you mean Cognitech's Datomic, yeah it's pretty friggin' cool. Really really liked it (well, the concept)... Until we started working

If by datalog with Clojure, you mean Cognitech's Datomic, yeah it's pretty friggin' cool. Really really liked it (well, the concept)... Until we started working out licensing and realized we were going down a rabbit hole of unclear future costs. They upped the cost on us in the middle of working on a project, their tooling was awful, they deprecated the REST API (which was a selling point for us they pushed) halfway through our efforts. We lost a lot of time, money (we paid for consulting work which was useless), and our product was delayed significantly. I know Stu will probably read this, but it's just the way it is. We also threw away Clojure then and never looked back. Doh, that's not what this discussion was about. It's an old wound that won't heal. :-)