This PDF document discusses some of the benefits and the problems solved with AutoCAD 2005.
Example from the document:
To archive project documents, organizations typically must copy individual drawing files from one folder to another. Storing multiple versions of drawing files increases the risk of using incorrect or out-of-date project information.
The Sheet Set Manager produces and stores copies automatically, providing a more dependable method for archiving project data.
Automatically archiving the sheet makes it easy to revisit project milestones. In addition, it ensures that you work with pertinent data and minimizes the chance for mistakes caused by storing multiple versions of drawing files."