Thanks so much for your votes and comments on this feature request. This feature is still on our roadmap, but just not in the next 12 months. We do plan to address several of the feature requests around hierarchies, for issues (JRA-4446), components (JRA-846), and versions, and the use cases around project / product / component decomposition that many customers have mentioned here. Thanks for all the background and clear use cases, because they will help when we begin to implement this feature.
Should you decide to implement your own plugin to support this requirement, please make sure to read about JIRA entity properties which may greatly reduce the effort required to implement the plugin.
While we will not be addressing this feature in the next 12 months, we plan to resolve several other top voted feature requests in the next 12 months, including JRA-3156, JRA-3821, JRA-1431. And we have recently resolved
JRA-32199, JRA-32200, JRA-2703 and JRA-7659 as well as provided the first drop of functionality related to JRA-3157.
Thanks for your patience and we hope you appreciate our open approach to feature requests.
JIRA Product Management
bartek (at) atlassian (dot) com