With tasks, every time a change is made to its status, a comment is added to the Activity Log and owners & assignees are notified. Projects on the other-hand, do not record changes that are made to their statuses in the project's activity log. Project owners are not notified if their project's status is changed (and when). This makes it difficult to follow-up with users who mistakenly change project statuses in order to correct that behavior. It is also an issue if projects are mistakenly marked as completed, and users have their left-hand project/folder list filtered to hide completed projects.