title: What is the reason for the CD /D switch in Windows cmd?
body: <p>At first I'd like to say that I <strong>do understand</strong> the purpose of the <code>/D</code> switch for the <em>Windows Command Prompt</em> <code>cd</code> command. I'm just curious why it works this way, and not other. As we all know, it does the following:</p>
  
  <blockquote>
    <p>Use the <strong>/D</strong> switch to change current drive in addition to changing current directory for a drive.</p>
  </blockquote>
  
  <p>But every single time I enter (for example) <code>cd F:</code>, it's obvious enough that I would like to change the drive. That is why I think this switch is redundant by itself.</p>
  
  <p>So what's the point of explicitly setting this switch? <strong>Why it isn't implied by default?</strong></p>