User blog comment:Jenburton/An Update on Message Wall/@comment-1714259-20111001131715/@comment-28861328-20111001225858

And what might that be? If you want to hide lengthy conversations on a talk page, simply use a hide template, that a lot of wikis have, to hide conversations and, at same time, allow you to view them with a click of your mouse. Need to archive them? People have been manually doing that for years now, and there are even bots that will do it for you; just like Message Wall does. And you archive it when you think the page is too long. Not after a set (20) number of conversations.

All Message Wall is is a giant Facebook wall with no real improvements on the old system.