title: Why there are no 5-byte and 6-byte code points in UTF-8?
body: <p>Why there are no 5-byte or 6-byte code points? I know they were till 2003 when they were removed. But I cannot find <em>why</em> were they removed.</p>
  
  <p>Wiki says</p>
  
  <pre><code> in order to match the constraints of the UTF-16 character encoding
  </code></pre>
  
  <p>but I don't understand why it's important.</p>