The history of virtualization has shown us that it is far easier to containerize existing software than rewrite it to support strict isolation. Most OSes (sans

The history of virtualization has shown us that it is far easier to containerize existing software than rewrite it to support strict isolation. Most OSes (sans macOS) aren't really setup for sandbox-by-default either. The mainframe industry already went through this years ago. They invented virtualization and leveraged it to transition through major new CPU architectures, complete re-designs of IO stacks, and switching out entire operating systems. None of these are new arguments. Virtualization won then and it will win again. You could say the entire history of the industry is increasing levels of abstraction; containers and virtualization are just another step along that path.