The common perception in both academic literature and and the industry today is that virtual machines offer better security, while containers offer better performance, however a detailed review of the history of these technologies and the current threats they face reveals a very different story. This talk is an early preview of a survey paper covering key developments in the history of virtual machines and containers from the 1950’s to today, with an emphasis on shattering myths and seeking a viable path forward for secure isolation in large-scale multitenant deployments such as cloud and containers.