title: Is it still necessary to include non-Retina assets in iOS apps?
body: <p>Is it necessary to use non Retina assets in new apps? </p>
  
  <p>I am asking because they take up considerable space and they're a significant time sink in my design workflow. Nowadays in late 2012, the only supported non-retina devices are steadily dying out. According to my stats: <code>13.8%</code> of my users were on <code>iPhone 3GS or older</code> (including older iPhones and iPod Touches 3rd gen and below) during the month of September.</p>
  
  <p>I'm not asking whether it's a good idea or not (sometimes it's good to create less detailed artwork for lower res devices). </p>
  
  <p><strong>I just want to know whether only including @2x assets will work reliably on non-Retina displays and whether there's any implications?</strong></p>