[tracker1]

I think that material design works well for applications in particular... a lot of the time too much is shoveled into applications without a concern for information overload, material design enforces this to some extent.

That said, even looking a step back towards, for example twitter bootstrap, it's about keeping things clean and orderly. One of the examples I appreciated was the password prompt, too often what is allowed in a password isn't clear, and to be honest, I'm almost in favor of allowing pretty much anything, I wish people would use "passphrase" instead of "password" and encourage multi-word phrases, even a full sentence. "Fear is the mind k1ll3r." for example.