title: Why dont Android applications provide an "Exit" option?
body: <p>Is there something in the Android developer guidelines that disuades developers from providing the option to "exit" (stop running) an application <em>from within the application itself</em>?  </p>
  
  <p>I love multitasking and all but it's not clear to me why:</p>
  
  <ul>
  <li>the vast majority of apps don't have their own Exit functions and hence just keep running forever</li>
  <li>don't give you a choice about running when you turn on the phone - they just do by default </li>
  </ul>
  
  <p>Both of these things lead to memory usage constantly increasing and your device running with this performance burden <em>all of the time</em> despite the fact that you may only want certain apps to run <em>some of the time</em>.</p>
  
  <p>Am I missing something? </p>