title: Why is lockless concurrency such a big deal (in Clojure)?
body: <p>I'm told that Clojure has lockless concurrency and that this is Important.</p>
  
  <p>I've used a number of languages but didn't realize they were performing locks behind the scenes.</p>
  
  <p>Why is this an advantage in Clojure (or in any language that has this feature)?</p>