It’s probably a very personal opinion about the 16" esthetics, but I‘m not really convinced by the black plastic material used for the keyboard, numpad and the space above them. Compared to the 13", which looks closer to a MacBook, it seems a bit cheaper to me.
But there is probably a reason behind this choice? Solidity, heat resistance, flexibility, weight, cost reduction… Does anyone has an idea? It’s not mentioned in the deep dive about enclosure.
At least, as the hinges seem to be attached to the magnesium bottom cover directly, we probably won’t have this kind of problem after thousands of openings. 
