[lomnakkus]

I think there's an important difference between CQRS/ES and Datomic, namely that Datomic is actually "just" a persistent data structure (in both CS senses of the word).

In CQRS/ES you don't usually want to store the state as such, you just store all the logical events which lead to a certain state. While the Datomic approach is certainly valuable for certain scenarios if you want to query historical data, it's less so if you want to know why something looks the way it currently does (in terms of the domain).

(At least that's my understanding of Datomic, I may be mistaken.)