Back in the olden days (early 2007), there was one player in IaaS: Amazon Web Services (AWS). And AWS had one instance family, the M1. It was good. But as tech years move faster than dog years, the landscape has changed quickly and dramatically. There are new players — notably Azure, Google, and IBM SoftLayer — and new offerings. Even when you consider only the compute offerings of the IaaS providers, the options are vast and varied. Granted, compute is at the core of what these providers offer, and as such they look to differentiate those items. The result has been an explosion in the number of options in the compute realm of IaaS.