One of the rationales for cloud computing is it saves money by cracking up utilisation. Providers observe how much users "really" use and then provisioning tha

One of the rationales for cloud computing is it saves money by cracking up utilisation. Providers observe how much users "really" use and then provisioning that much. True, sometimes you will leave boxes at low utilisation for various reasons, e.g. to deal with traffic spikes. But those reasons have not gone away. So now instead of heaving a predictable increase in CPU cost, you have an unpredictable increase in performance snafus. The only good news is that the real performance hit will be less than 30% on many workloads. Especially once the providers start juggling and optimising.