I've been repeating something like 'keep thinking about how we would run this in the DC' at work. The cycles of pushing your compute outside the company and then bringing it back in once the next VP/Director/CTO starts because they need to be seen as doing something, and the thing that was supposed to make our lives easier is now very expensive...

I've worked on multiple large migrations between DCs and cloud providers for this company and the best thing we've ever done is abstract our compute and service use to the lowest common denominator across the cloud providers we use...