I had figured that nanorobots would be the only way for Transformers to pull off the transformations and reformattings they do. Otherwise, where do the car's seats and steering wheel go in robot mode? Where does the robot's head and hands go in vehicle mode? I would think that both sets of components would break down into their constituent nanorobot parts and reform their other mode's parts. Not all parts would break down, which is why you have vehicle parts on the robot mode. I think that Transformers operating this way would keep some kibble just to save energy on transforming. Also, in Beast Wars, the protoforms were explicitly shown to be made of nanomachines, as in "The Spark," the episode that debuted Airazor. Good point, one that I hadn't considered. I need to go back and rethink some of my theology.