its now been almost one year since the last release of the Atlassian SDK. To date, there still exists version 8.0.16 and no update has been shipped since April 2019.
There are multiple problems that are resolved for 8.0.17 (unreleased, https://ecosystem.atlassian.net/projects/ATLASSDK/versions/83118/tab/release-report-all-issues) or 8.1.0 (unreleased, https://ecosystem.atlassian.net/projects/ATLASSDK/versions/83172/tab/release-report-all-issues).
A similar situation currently exists for AMPS. Many users with problems still use old AMPS version such as 8.0.0, 8.0.2. Version 8.0.2 was officially released last year but the announced release notes are missing entirely Announcing AMPS 8.0.2. The documentation https://developer.atlassian.com/server/framework/atlassian-sdk/amps-sdk-release-notes/ contained a 8.0.2 with a dead link. The link was removed instead of creating a release notes page.
Version 8.0.4 was published some time ago (no release notes) - and 8.1.0 (https://ecosystem.atlassian.net/projects/AMPS/versions/83200/tab/release-report-all-issues) exists now. Again, no information about it, no release notes. As for AMPS we have the possibility to manually specify a version. However, many users do not know about it and rely on the provided version of the Atlassian SDK.
@Atlassian: The Atlassian SDK and AMPS projects are a central part of developing Server and Datacenter Apps. The time we lose while working with broken and outdated tools limits the amount of time we can spend on improving the App ecosystem.