I hate MD and this video helped me to understand why I hate it: they are trying to do judge by analogy, which causes «analogy driven design», where you should understand analogy to understand what you see. I newer saw real objects to behave like their imaginary «real objects». It looks like they are just getting money for something that nobody knows how to do properly, so they are doing something and arguing correctness of their work with self-made arguments. IMHO, if they will be hired to do an animation film, they will be fired pretty quickly for their «material design», because it looks false.