If you ever wonder "why the fuck can't I tell where one piece of the UI ends and the other begins"
When Material Design was first launched to the public, I was astonished of just how bad some of it was – and how Google, with all its experts and resources, had managed to ignore so much basic HCI.I wasn't able to recognize and distinguish different types of widgets from one another, and the design language broke with established principles. It wasn't evident how to interact with an element on the screen based on its visual qualities.