There's something I've been wondering. Where is metal going to go next? Thrash was created in the pursuit of heavier and even more extreme metal, and then black and death doing the same, eventually killing thrash. With death and black metal being the apex of metal extremity right now, where are we going to go next? Will new metal bands keep seeking new extremities, or are we at the peak? Should we be looking into grindcore and it's subgenres such as deathgrind and goregrind for the future? This is speaking in terms of metal advancing in extremity and brutality, not thinking about other genres of metal that aren't created in the quest for extreme metal.
Metals like iron, potassium, zinc, and magnesium are found in the human bloodstream and are needed or else we'd all be dead.