I work for a group that has decided to use material design to guide out UX design and I am a complete convert. Material Design provides the base design language for our components and then we extend it as and when we need to. It has made our design work much more consistent and means we are doing real design reuse. Also there are good frameworks for building our components which our developers can use.
My question now is what is stopping everyone doing this? I am trying to make this a specific question so that it falls within the rules. So please just answer with your top reason. I think it will really help me understand the scope of the Material Design space and what the limitations are.