There was a difference between hosted blogs, forums etc before and the new 'social-fied' ones we have now. It's not revolutionary, but it's a big enough change from 2 when that started to warrant some different tag imho. Blogs on blogger etc you still discovered yourself, now it's just an endless stream of garbage I don't care about (even though 'it knows me') with ads 'sprinkled' (hosed) in there on most platforms.