The difference is that in Clojure, `assoc-in` is effectively a deep copy as well since the data structures are immutable. Most of the complexity involved with n

The difference is that in Clojure, `assoc-in` is effectively a deep copy as well since the data structures are immutable. Most of the complexity involved with nested maps is about the effects of modifying them. In practice, this doesn't exist in Clojure.