A search engine that only indexed Reddit, Stack Exchange, Wikipedia, and a small number of other "good" sites would get 80% of the way there. No, DDG bang oper

A search engine that only indexed Reddit, Stack Exchange, Wikipedia, and a small number of other "good" sites would get 80% of the way there. No, DDG bang operators don't let you do this. I want an SERP, not a shortcut to a single site's on-site search.