There's a whole world of modern unindexed handcoded html + light js sites that really hearken back to the mid-90s web, and they're often part of webrings.
I'm thinking more like just taking all the text files from 80-90s and making a separate static, frozen in time internet.
Today we don't need comprehensive, we need maximum signal and minimum noise.
Interesting take. Do you mean Wikipedia has cannibalized the traffic to these web sites or do you mean that Wikipedia lead to these web sites going offline altogether?
But hand curated human directories should in theory have a very high signal to noise ratio. Every link should take you to a quality site.