For all the data Google has, and all the AI and technology, their search isn't very "smart" at allowing you to contextualize or filter the searches very well.
For example, a button to remove social, to offer meta-data (such as whether a question is answered/unanswered) or offer features that might help me find what I am looking for.
Google has a huge index, but naturally, there's going to be 'noise', and maybe I want to see what's on page 50, or want to try and 'filter' some of the more popular sites.
Their UI for enabling this is non-existent.
Another example: Google BigQuery has the entire Reddit archive, they could surface meta-data such as the number of comments or whether entire comment chains are deleted (although, doing that against Reddit's API at scale would be a very difficult challenge and perhaps not welcomed by reddit).
But to me, as a user of search, that might influence what content I end up viewing, because perhaps a thread with 0 comments isn't so useful to me, or a thread full of [deleted] comments is worthless and should be de-indexed (and deciding what is valuable is a very hard question to answer).