Personally, I do not clearly see such a thing to be “a long-term lasting Super Search criterion,” mainly because it seems to me to be “entirely subjective.”   Whether the judgement comes from the OP or from the respondent(s), the judgments are entirely that of the responding individual . . . and the ranking (beginner / intermediate / expert) are both objective and biased.   Therefore, not useful for a search.

And, IMHO, “at the end of the day, it all comes down to ... perhaps(!) years(!!) later ... “a Super Search.”

“perlmonks.com is:   A Freakin’ Big Database,™”   now containing tens of thousands of entries.   “Categorizations,” whatever they might be, in order to be useful, must stand the test of time.