I think it depends where you draw the line. These comparisons can be hard to make due to different accounting of what counts as "reuse." In this reply to a friend I was taking a very broad economic like view. For example: no one is rewriting the linux kernel from the ground up to launch an ecommerce app. Likewise people generally aren't rewriting the functionality provided by their langauges' standard libraries for each app. So in the broadest sense of all labor involved, there's a lot more reuse going on than a more narrow experiment may consider.