We all come through Google to questions like "Which is better Matlab or OpenCV?" or "What are the best resources for learning ?" These questions tend to be closed, sometimes marked for deletion, be primary opinion based, have hundreds of upvotes, and be really useful.
It would be good if these were always available, perhaps though automatic migration to another StackExchange instead of deletion. While the knowledge is not in the StackOverflow form, it is knowledge none the less.
Is there any consistent attempt to save this knowledge?