Comment by jrmcauliffe

A fair chunk of modern corporate data ends up in OLAP systems that are now more often or not stored using s3 (or their MS/Google equivalents) in 'Data Lakes'. The concept of 'private data' whilst using cloud providers is an interesting one, but there has been enough work done by all parties involved to ensure that all but the most sensitive data is now created, stored and analysed using the systems provided by "Big Cloud".