From folks I know at AWS, services are all being heavily pushed to use Graviton to run their services, to the point of having to justify why they couldn't. The cost savings internally are just as significant.
I am now going to go down the rabbit hole of arm specific bugs in the libraries I use because so far all of the applications I dev (arm ubuntu) have never encountered any bugs.
I think they will transition all services that do not expose infrastructure (think i.e. Cognito, Pinpoint, VPC, Api Gateway, CloudFormation, ...) ASAP.
