> For businesses with <10 servers and half an IT person, the cost difference is practically irrelevant.

If your infrastructure consists of ten t2.micro instances vs ten Raspberry Pis, then sure. In any other case, migrating VM or bare metal workloads from your own hardware straight onto EC2 is one of the most effective ways in the world to incinerate money.

You can do well if you've got a workload well suited to 'native' PaaS services like S3 and Lambda, but EC2 costs a fortune.