This is the first line on the front page:
This is the official NixOS Wiki. It contains NixOS user guides, configuration examples, and troubleshooting tips.
Since no one really objected to what I argued for, I updated a few pages to be more precise on the role of the Wiki: Contributing - NixOS Wiki
I’ll try to find time to update the instructions on nix.dev and make another sweep over the Wiki, so it’s all roughly aligned.