Yeah, that would be the hard part. But in the spirit of the old internet, make it first and then, if it becomes popular, deal with it.
Just have to read up on the history of Yahoo and watch that last season of Halt & Catch Fire. ;-)
Wiki? With a double approval before the edit happens?
Just bring back DMOZ, it was by no means perfect but was a great curated directory of the old internet despite SEOs always trying to spam it. Apparently Curlie is trying this but I haven't really looked much into it: https://curlie.org/en