At one time there was a button in the finder (top right) that allowed you to duplicate a page or an asset. We used that feature quite a bit with our catalog that requires us to maintain content for a certain amount of time and in order to keep up on the changes that occur we would copy the asset and make the change. Once the catalog could be edited we would copy the new content into the old asset so it would go live throughout the site. This is also a function I have used for our slide shows at the top of the pages to copy and just swap out the photos instead of the whole set of code.
This was an incredible time saver and would like to see it return.