I agree, you picked up on a point in the article which said, in summary, Google solved a problem back in 2000. I believe that Google is still solving that prob

I agree, you picked up on a point in the article which said, in summary, Google solved a problem back in 2000. I believe that Google is still solving that problem, and again in 2008, it also attempted to solve the "trending" problem. I think the trending problem is "solved" by Facebook and Twitter because of their structure, so the next step is to search the structure for data. Google doesn't do this. So, I agree that nothing is lost, however, we clearly have two modes for searching: an Archival mode, and a Trending mode. They tend to interfere with one another when both results are displayed in the same list (Search Engine says: "You clearly want the most recent stuff, right?") . The next step is to now separate the two result sets so that more relevant information can be found more easily within the context of the search query.