title: Don't keep activities - What is it for?
body: <p>The title is pretty self-explanatory. I understand what this developer option does. </p>
  
  <p>What I <strong>don't understand</strong> are the following points:</p>
  
  <ol>
  <li>Why was that option introduced, in the first place?</li>
  <li>After all the changes that the framework has seen throughout the years, is it still useful?</li>
  </ol>
  
  <p>I am eager to know the reasons behind this option.</p>