We’ve been involved in some exciting moments as we’ve watched the networking landscape over the last forty-or-so years. It’s often only with hindsight that we can see where the important inflection points were. Sometimes we look back and think that the outcome was inevitable, but at the time, many different outcomes seemed possible. SDN strikes me as a technology that might have easily failed to launch, and certainly I wouldn’t have predicted the path that it has taken. This week we’re looking at how I experienced the transformation of SDN from science experiment to mainstream technology.