I have answered some questions on StackOverflow. Many times, on a given tag, questions, very similary, but not exactly the same comes.
if it does not exist, it would be interesting if users, can host subjects folders, for which they can choose the title and inside which they can put shortcut to questions or answers. In other words it can be a sort 'favorites' organisation that a user can share with other users.
(edited) My proposal is not clear, but it can be useful to find a way to group same questions and same answers.
I just need to classify my favorites into folders, and perhaps publish these folders as meta subjects.