title: Does babel need es6-shim?
body: <p>I mentioned on Twitter that I was moving from <code>es6-shim</code> to <code>babel</code>. Someone else mentioned:</p>
  
  <blockquote>
    <p>the shims are still needed even with babel. they fix broken builtins, ones babel's output uses.</p>
  </blockquote>
  
  <p>So:</p>
  
  <ol>
  <li><p>Does babel need es6-shim or similar?</p></li>
  <li><p>If it does, why doesn't babel <code>require</code> these things as a dependency? </p></li>
  </ol>
  
  <p>Answers with references preferred over 'yes / no' with no supporting arguments!</p>