Seems that managed VM's are the future of App Engine. Looking at their feature matrix, it appears that the primary benefit of old-sandboxed apps is that they la

Seems that managed VM's are the future of App Engine. Looking at their feature matrix, it appears that the primary benefit of old-sandboxed apps is that they launch within milliseconds, versus minutes in managed VM's (https://cloud.google.com/appengine/docs/managed-vms/ https://cloud.google.com/appengine/docs/managed-vms/). I'm only now learning about their capabilities. From what I understand, they allow arbitrary environments using Docker files. How else are they different from normal compute engine VM's? Is it because they are spawned and load balanced? Does that mean they are more analogous to Docker on Elastic Beanstalk?