User blog comment:Rappy 4187/Technical Update: April 19, 2017/@comment-28083312-20170420214829/@comment-5645428-20170423081854

You mentioned all the modules that appear in the normal rail that I am aware of. The classic editor also uses modules (.module), albeit with a very different configuration.

There are no obvious on-page links to get to wall/thread histories. The easiest way is to use the History link that situationally appears on the footer toolbar, and is probably one of the last places determined editors discover on a wiki.