That's just the template format version, not the version of the service. Actual features and resources are being continuously added to CloudFormation. See release history: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGui...
Unless I'm confusing your comment.
That's just protocol versioning - it means they haven't made backwards-incompatible breaking changes to the template protocol, not that the features haven't been updated in 10 years.
Please do tell us what changes they should make to their template format such that it would require a version update.
Re:AWS CloudShell
by johnmaguire2013 on Tuesday December 15, 2020 @08:34PM
(#25437960)
In some circles, this is seen as a mark of stability.
Last version was 10 years ago and this service is one of the core AWS services, so it's definitively not abandoned.