Thank you! Right now our main use case is cloning development environments so we can provide a fresh running dev env for every branch and PR. However there are many other interesting applications, like speeding up CI jobs with VMs that start from a snapshot.

I'll make sure we write about the other topics as well. For the network, we run the VM in its own network namespace on the host, and we give every VM the same IP. We then use an iptable rule to rewrite every incoming and outgoing packet to the IP that the host has assigned for the VM.