title: ShellIconOverlayIdentifiers - why so few?
body: <p>At this point, everyone knows that there's a limit to the number of <code>ShellIconOverlayIdentifiers</code> (from MSDN):</p>
  
  <blockquote>
    <p>The number of different icon overlay handlers that the system can support is limited by the amount of space available for icon overlays in the system image list. There are currently fifteen slots allotted for icon overlays, some of which are reserved by the system. For this reason, icon overlay handlers should be implemented only if there are no satisfactory alternatives</p>
  </blockquote>
  
  <p>I can understand the 15 overlay limt in Windows 95. But in an environment where there's Gigs of RAM, numerous Cores, and GPUs, is there some technical reason for such a low number in a modern operating system?</p>
  
  <p>And why isn't this value configurable?</p>
  
  <p><em>Before giving the 'performance' answer, consider:</em>
  Windows allows for configuration such that you can kill performance... why pick on this issue specifically?</p>