You have to remember that anyone can write (maybe not write well, but can write). Not too many people can use AutoCAD and ever fewer have enough knowledge to be pumping out one a day like this guy.
Imagine if wiki spent their money on building tools to allow people to create multimedia content for the site.
AutoCAD models are an extreme case, but how about a tool to make quick vector drawings, or a tool to make flow charts to explain complex concepts. All right there in the wiki interface. All super easy to use. 10x-ing content creation.
