I think you're right on the first half. For monolithic apps, it's expensive to run on AWS. Expensive vs. the DC depends on a lot of other factors so YMMV. 12F

I think you're right on the first half. For monolithic apps, it's expensive to run on AWS. Expensive vs. the DC depends on a lot of other factors so YMMV. 12F apps, microservices, etc. are much _cheaper_ to run on AWS because you don't have to worry about scaling/provisioning/and HA/DR capabilities are basically baked in. A lambda that processes 100,000 requests/day is, on average from the teams I've worked with, significantly cheaper to run than a machine in a DC that is always up.