But I have a beefy server with capacity for many extra VMs for a fraction of the price, so I can still spin them up on a whim. The power use is proportional to

But I have a beefy server with capacity for many extra VMs for a fraction of the price, so I can still spin them up on a whim. The power use is proportional to system load so I'm not paying much continuous overhead, just the up-front cost of having a larger server.