Cloud computing is often spoken of in “as a service” terms like IT as a Service, Infrastructure as a Service, Software as a Service, and Platform as a Service. And each has its well know XaaS acronym to go along with it—ITaaS, IaaS, SaaS, PaaS. Public clouds that fit into these descriptors tend to get lumped into an amorphous cloud blob where all appear to offer the same value propositions like IT agility, “infinite” scale, and lower cost per unit of compute power.

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