Earlier quoted context omitted.
Nothing lives forever even for AWS/Azure. Maybe not forever, but some things do live for a very long time. Amazon SimpleDB has been deprecated for over 5 years and Amazon works hard to discourage people from using it in any new applications... but it's still available and will continue to be available for the foreseeable future.
And if you have a really old account you can still use an instance outside of a VPC. I’ve never heard of any service that AWS has just outright abandoned.
Yes, you are strongly discouraged from using some services (simple db) by them hiding it. Yes, new accounts can't use certain services (ec2 classic). Yes, some old features cost more than newer better features (rrs s3).
But I wasn't able to point to any AWS service that had been shut down.