Thread:Project:Support desk/Make all pages/main-namespace behave like categories/category-namespace/reply (3)

You can certainly use just category pages if you wanted to. There's no right or wrong way to organize a wiki. Many of the differences are artificial, and a result of at some point long in the past, someone decided the model we currently use fits well with Wikipedia ;). When I say there are assumptions made about categories vs non-categories, I mostly mean they are made inside the php code, which would make it very difficult to have a $wgTreatMainNamespaceAsCategories variable.