This is a meta issue tracking the implementation of Tag Retention Policies
Not many people have the luxury of unlimited storage. For images and tags that are effectively ephemeral (like those built and tagged for use only by an intermediate process in a CI pipeline) it does not make sense to keep these tags around for an extended period of time, consuming precious resources. Other tags, like those correlating to released or deployed software may need to be kept for an extended period of time or even forever for various legal or compliance