As new technologies and productivity tools are integrated into our daily workflow, it's inevitable that the way we work, at an organizational and interpersonal level, will change. New means of communication and collaboration will challenge convention in the workplace, leaving us to establish new ways of interacting and working.
Document sets are so great I am sure you have thought up lots of different ways to use them, but there is just one problem. You have been using previous versions of SharePoint and already have tons of content that should be turned into document sets. One option is to use SharePoint copy functionality to copy items and the Document Set object model to create new document sets.