The point I was trying to make was that tagging is broken but tags are not dead. They just need to have a purpose. Making the user to catalog the content instea

The point I was trying to make was that tagging is broken but tags are not dead. They just need to have a purpose. Making the user to catalog the content instead using search is not a valid purpose. In many apps, the tags just seems to add up in a mess. You will more tags that you care of and in the end you're not sure what's the point. Are you tagging them for finding them later or just for fun? In the end we gave in, but with hashtags, since they don't add any complexity if you don't use them. We still try to guide to people use them purposefully. I like how in twitter they're very subtle but can be a powerful way to guide the discussion. If you want to find something, use search. Don't rely on tagging and trying to remember the tags you sued.