An OddMuse option activates this to move from Wiki to WikiLog. You can even disallow editing of "normal" pages and only allow editing of comment pages.
At the bottom of normal pages, you will find both an "Edit this page" and a "Comments on this page" link. Comment pages are often distinguished by their name prefix. Using the name is the simplest scheme that works. For example, WikiPedia uses a "talk:" prefix to distinguish comment pages.
Comment pages on OddMuse can be edited like normal pages, but the most prominent feature is an edit box at the bottom. When it is used, the text is just appended to the comment page.
Other systems have a different editing metaphor for comment pages, more explicitly supportive of ThreadMode. For example, [WakkaWiki] uses a mini-BBS.
Of course these pages can be created manually (see pagenames with the suffix "Discussion" on Meatball) but to automate this process has several advantages:
Easier to participate:
Easier to read:
A possible drawback is that it causes severe ReworkingProblems.