Alternatively you could federate it. Maintain wikipedia as the primary instance but allow users to add secondary, wikipedia community vetted wiki instances to t

Alternatively you could federate it. Maintain wikipedia as the primary instance but allow users to add secondary, wikipedia community vetted wiki instances to their account so that they can seamlessly flow between them. Those instances can serve as "incubators" for not sufficiently notable pages and then if they reach notability they can be transferred from the local "small" wiki to "big" wikipedia without losing any of the internal page information (like discussions or old revisions) or local context (still linking back to the "small" wiki). That way you could have the default unlogged-in wikipedia which shows only the officially vetted pages but then also provide a "wider wikipedia" that includes pages that are of sufficient quality but not quite there yet. And then your local "small wikipedia" pages that don't meet the requirements to move up into the wider network yet. This would maintain coherency between the wikis for the users who care while also allowing the core wikipedia admins and mods to focus their energy on maintaining a tight selection of well established, notable articles. And then users could choose how wide their wikipedia experience is.