Prior to AWS at Amazon hosts were provisioned as “host classes” and typically operated on in that way. We were encouraged to make them “touchless”, which meant the infrastructure team could replace that host without contacting the team first. The deployment tool deployed to host classes (though you could put an individual server there if you wanted). EC2 wasn’t quite the same, but not very foreign either. We didn’t originally even use the AWS interface (at the team level). They were managed by a team working on the transition.