> Rent to AWS actually drives demand up quite a lot since the bills are huge and very few people understand what is under the hood and how it can be optimized.

A few years ago I participated in a Splunk deployment and the cloud solution utterly dwarfed an in-house enterprise solution, in regards to cost. Even in the event that cost was irrelevant, certain sectors (financial institution(s)) are going to have a difficult time pivoting to a cloud-based solution and relinquishing control over the underlying infrastructure.