How long it takes for a surveillance system to be replaced has a huge impact on adopting new products or technologies. Like cars, security users do not buy a new surveillance system every month or even every year. Indeed, systems are clearly only purchased every few years - but is it every 3, 5, 7 years or more? The longer it is, the harder it is for new technologies - whether it is IP cameras, HD SDI cameras, VMS, video analytics - to break it as they typically need to wait for the big new replacement purchase. In this note, we provide the first end user survey results to answer that question.