The dynamics between public and private cloud tip a little more towards private cloud every time that there is an outage or with each new generation of IT technology that folks like Cisco Systems, Dell/EMC, Hewlett Packard Enterprise, Huawei Technologies, IBM or Lenovo bring to the market. It is unlikely that businesses will halt their march to the cloud and move back to hosting all their applications on the traditional bare metal or virtualized server environments that had been popular for the last 20 years, but these episodes may cause people to think a little harder about data location and availability. This makes private cloud more interesting. Hybrid IT, gives businesses a combination of their datacenters, co-location and external cloud for hosting applications that could be traditional, virtualized, public cloud or private cloud.
Source: With Its Recent Outage, Amazon Web Services Is Helping To Sell Hybrid IT