[sysk]

My current web app is composed of 10 database hosts and 11 REST APIs. 21 VMs would blow my laptop's resources away while 21 containers run just fine. For me, that makes Docker a lot more attractive for local development. Also, Docker removes the need for a CM if you are into stateless deployments.

[bryanlarsen]

If you're running a large number of VM's, vagrant-lxc is awesome, so are offsite targets. (digital ocean, AWS, et cetera)

Vagrant also has more options for stateless deployments than Docker: docker, packer, nixos, et cetera.