One situation I found where AWS saves money is in over-capacity situations. If the a company builds a data center that is too large, they are incurring costs f

One situation I found where AWS saves money is in over-capacity situations. If the a company builds a data center that is too large, they are incurring costs for under-utilization. Paying a 50% premium on 100% of resources might still be better than paying 0% premium on 200% of resources. The cloud versus on-premise discussion has many variables, so it all depends on the situation.