I think OP was talking about managed services, like lambda, Ecs and beanstalk internal control, EC2 internal management system, that is systems that are transparent for the user.
AWS could very well run their platform systems entirely on graviton. After all, serverless and cloud is in essence someone else's server. AWS might as well run all their paas software on in-house architecture
Maybe I wasn't clear enough. I am talking about code that runs behind the scenes. Management processes, schedulers, server allocation procedures, everything that runs on the aws side of things, transparent for the client.
AWS could very well run their platform systems entirely on graviton. After all, serverless and cloud is in essence someone else's server. AWS might as well run all their paas software on in-house architecture