Wait, Datomic with Riak as the backend? That seems a ridiculous level of abstraction, since Riak itself uses pluggable backend stores (Bitcask or LevelDB). Like

Wait, Datomic with Riak as the backend? That seems a ridiculous level of abstraction, since Riak itself uses pluggable backend stores (Bitcask or LevelDB). Like creating a programming language whose interpreter runs on the JVM.