title: In pharo, it's possible to run code inside both playground and transcript. When to do each?
body: <p>In Pharo, it's usual to run code inside Playground, and using Transcript to print the output. But I noticed it's also possible to run code inside Transcript, not only printing things there. For example, if I type:</p>
  <pre><code>Transcript clear.
  </code></pre>
  <p>Inside the Transcript window, and run it by Ctrl+D, the window will be cleared. So my question is, when does make sense to run code inside the Transcript window instead of Playground? Is there a use case?</p>