when an idea is promoted to a feature on the product roadmap, it would be helpful if the system automatically sent a notification to all the idea subscribers letting them know which release name/# the feature was promoted into.
Also, as an extension of this concept, it would be interesting to send additional updates if the feature is moved from one release to another
This currently exists today. When an idea is promoted to a feature, all idea watchers receive an automatic notification which indicates that the idea has been promoted to a feature (and includes a link to access newly created feature to view additional details including the Release.
Idea watchers are automatically added as watchers to the promoted feature. So any updates made to the promoted feature will also automatically notify feature watchers.