Rust doesn't let you have a mutable reference while you have immutable ones. It's only a problem in Rust because mutating the underlying data would cause problems for chunks of code using the immutable data.

But in Clojure it's not a problem. I find lots of applications where working with stale, consistent data is just fine.

Also, if you ever need to rewind your state Clojure's immutability makes it trivial. I've used this in e.g. latency compensation for multiplayer games.