User blog comment:MisterWoodhouse/Community Contract for the New Fandom Platform/@comment-37949401-20190627220529/@comment-34804319-20190628115141

There is no "standard" skin that should be used for any platform. Just because Wikipedia chose Vector for their skin does not make it a standard. Fandom uses Oasis, others use Monobook and Vector. It is up to the platform hosters to decide what skin they think is best for their site.