User blog comment:DaNASCAT/Technical Update: April 4, 2016/@comment-24258073-20160405012157/@comment-126761-20160405123844

We're quite happy with the idea of rollback (and bots) being able to self-demote - a request has been put in to add that.

Creation abilities for deprecated features are reasonably likely to be retired at some point, but we generally want to keep the data they create around for as long as reasonably possible (it can still be interesting, and so that users can copy it if needed).