To quote the Canon website regarding the 1DC "Exterior Material Magnesium alloy" We all know that these magnesium alloy bodies have coatings over them, and whether or not that is plastic doesn’t matter in the conversation. In this thread of conversation, you yourself referenced “Nikon D810 has a Plastic, carbon chassis”. What matters here is how robust the carbon fiber reinforced chassis will be in comparison to magnesium. I don’t have any doubt that this material will be perfectly useable, I agree with you in that. However, I would appreciate it if you could realize when you are trying to make a point simply for your ego. It is important to see the difference in use case between the covering around the camera and the camera chassis. While as a covering it may be perfectly fine to use plastics, it is also reasonable to suggest that this may not be suitable as the chassis as well, especially in a professional use case.