I don't think it's purely a measure of cost per compute operation. That assumes you would run the same software on any cloud using plain VMs or a service that s

I don't think it's purely a measure of cost per compute operation. That assumes you would run the same software on any cloud using plain VMs or a service that slightly abstracts them. That may be true in this case since Twitter will continue to use Hadoop/Spark, but sometimes you can get a real advantage from switching to a service that only one cloud provider offers. For instance, someone in these comments pointed out that Twitter already migrated their anayltics workload to BigQuery. Evaluating BigQuery vs Redshift vs something else is not as clear cut as cost per compute operation.