AWS was obviously not going into building datacenters and taking a modern service oriented architecture approach cold. But, as you say, the pervasive myth is th

AWS was obviously not going into building datacenters and taking a modern service oriented architecture approach cold. But, as you say, the pervasive myth is that AWS started out by using excess retail computing capacity and presumably the same architecture which, by all accounts, is simply untrue. And GCP more or less started out as a classic PaaS. Azure really had more of an on-prem focus at first.