This isn't the issue were discussing. The amount of data is not a relevant issue currently. The issue is the inclusion and ranking of easily discernable junk.

This isn't the issue were discussing. The amount of data is not a relevant issue currently. The issue is the inclusion and ranking of easily discernable junk. Google has stopped caring, for my cited reasons, and can tackle this if they want. There is nothing preventing this other than it actually helping them by making their products preferable. For example, eliminating any page with referral links. Eliminating copycats. No, it's not an issue for them. This alone would get rid of 1/2 the junk. But that would reduce their silo. And further? It would mean that other search engines which buy Google search results would benefit too! Far better to show their picks on their first page results, whist keeping lower quality answers in their general search results. They can show competition exists, without really helping that competition, and people stay siloed.