At the time (many years ago) the largest instance type of OVH was used because that had the required disc capacity that the customer needed. On AWS S3 has a vas

At the time (many years ago) the largest instance type of OVH was used because that had the required disc capacity that the customer needed. On AWS S3 has a vastly different cost structure and the fact that you can use whatever instance type for your workload enabled us to save up this much. We could use some low spec m5.* instance type that was running with 80% CPU utilization for the workload and also we could use fewer instances. To re-iterate: - the most cost saving comes from the fact that we could de-couple storage from compute - the second part of the cost saving came from the fact that we could use fewer instances with lower spec