Also, from what I’ve been able to deduce, the AWS services are all just built on top of EC2 [un]modified open-source software until they reach a level of comp

Also, from what I’ve been able to deduce, the AWS services are all just built on top of EC2 [un]modified open-source software until they reach a level of complexity where they roll their own, which leads to lots of issues that can take years to fix. Some things are telling, like banning two consecutive hyphens because something somewhere in that pipeline is shelling out.