As in autospotting.org? That’s a pretty cool concept, but I wonder how you make that work with VPCs?

Can you get an EC2 instance that is deeply embedded in a VPC that is not reachable from anywhere else but a private network on a different VPC, and still replace that with a spot instance with all the same functionality?

Do you have to create an AMI so that you can relaunch an instance with a newer and less expensive one?

What about post-install configuration management that might need to be done?