I wouldn't compare a modeler like Blender to a CAD app like Vectorworks. Blender, like 3D StudioMax, is made for video and animations. In short, the screen image is the final product. Both are not useful for architectural work like I do, thought that does not stop these apps from dominating the industry. In my business (museum design, trade show booths, and other specialty interiors), the final product is produced in a wood or metal shop, not on a screen. I can't stand the lack of precision in apps like Blender, StudioMax and even FormZ (bless its little lost heart.) I think Rhino has great tools, but not really useful for me--overkill, really--since my products are produced from sheet stock (plywood) or stick-built from lumber and metal. Vectorworks is really the perfect solution for what I do and is why I've always used it. I just wish I had more control over some of the rendering tools, but, with the addition of Pixar's modeling tools, there really isn't much I can't model anymore. It is more an issue of not needing to and, therefore, I have not learned all the new tools. Yet.