Independently in conversation and in the feed a while back, folk have noticed that the world-wide result list ain’t what it used to be.
It’s known that one of the ingredients in Google search is the PageRank algorithm. As I understand it, the full algorithm identifies trusted directory pages for a set of terms. The destination pages linked from such directories get a higher rank for those terms.
Speculation: With the triumph of Google search, does anyone bother creating or maintaining directory pages about a subject any more? And if not … maybe there goes the petard?