Check out the incredible returns of Netflix stock, starting in the Qwikster doldrums of 2012.Picture, if you will, the summer of 2012. Netflix (NFLX -0.36%) separated its digital streaming service from the DVD-by-mail business nine months earlier, and nobody liked the new Qwikster brand.The company was quick to kill Qwikster, but the business model was forever split into stand-alone DVD and streaming experiences. Many investors had written off the company as a total loss, calling Reed Hastings one of the wo ...