As a person who has used the standard java debugger in intellij for clojure, could you expand on what features are missing? I find I don't get much use out of

As a person who has used the standard java debugger in intellij for clojure, could you expand on what features are missing? I find I don't get much use out of it anyway, due to immutable values and (mostly) pure functions I find I don't usually need the whole program to be running and frozen in time. However, I'd like to know what I'm missing.