I tend to think of virtualization as a sandboxing method instead of a deployment method. I'd only use virtualization if the apps I'm running may compromise the

I tend to think of virtualization as a sandboxing method instead of a deployment method. I'd only use virtualization if the apps I'm running may compromise the security or stability of the host machine. Otherwise, most web frameworks have some kind of deployment method, as well as support for different environments (production/test), and that's generally good enough.