Looks like the D&D Simulacrums page is scheduled for merger with--I'm not sure what. But the users on that page are saying it doesn't deserve it's own page. To be clear, this is the page that explains what retro-clones, etc. are.
I'm not adept enough to get in there and discuss--is there an experience Wikipedia editor out there in the OSR that can intervene?
It's important that the OSR and related movements have some solid article there to explain these games. This page sets up the reasoning for Swords & Wizardry, Labyrinth Lord, X-plorers, Mutant Future, and more.
Here's the discussion page