The nice thing about recur in Clojure is that it won't even compile if the call isn't in the tail position. I've inadvertently made a code change that moved the

The nice thing about recur in Clojure is that it won't even compile if the call isn't in the tail position. I've inadvertently made a code change that moved the recur call out of the tail position and the error became immediately obvious. With TCO you might not even notice until your stack blows up on a deep nesting.