Nikon pretty much modified their F mounts to accommodate AF. So while some people may argue the AF-D screw-drive is not as elegant a solution, I thought it was a good decision. Even in this AF-S VR age, I can still mount my Ai/Ais lenses. And you cannot imagine how nice some of the pictures can turn out when using those old dinosaur lenses.
I still put my trust in older technology. Ai Ais AF AF-D are stuff I hold dear. My Ai Ais lenses are more than 30 years old and still work beautifully. The lesser the electronics inside the lens, the less chance it will fail, or need a big price tag for repair. Eg. Just got my 85mm Ai cleaned out and regreased. Cost? $25. Guess how much a SWM or VR assembly cost?