451 Research recently published its 2016 Enterprise Storage Outlook in which both Amazon Web Services (AWS) and Microsoft become top 5 enterprise storage vendors by 2017. Further, AWS surges from 6th place to 2nd place while NetApp plummets from 2nd place to 6th place. Spending on public cloud storage over doubles between 2015 and 2017 while spending on on-premises storage falls over 17%.