There must be situations where knowing the history of node could be important. Who did what when, why, and how often. A list with one item or many. The severity of the change. Perhaps an attribute of a node would be a history object with its own table. Perhaps the page renderer could include the data at the foot of the page.

Think of all the reports you could generate. Perhaps an award for the most badly beaten up, molested article. There are certain monks that would be weighed down with medals if such information was available in the monastery. :-)