Honestly, a testament to current Wikipedia design, because while it's fun to click around it's literally impossible to find what you need in this kind of GUI. (Geofile explorer is simply baffling.)
What does Wikipedia do differently? I don't think I have ever used Wikipedia's internal navigation - if I want to find something I usually type 'XYZ wikipedia' into Google and click the first link.
I often use category links on the bottom or in the sidebar when researching. Also I use search, which doesn't work in this alternative GUI. Sometimes I check the article in another language.