re: NuMetal is the most egregious assault on music since it's inception.

Mudvayne was never anywhere near as popular in their first run as they are today. Tiktok is exposing the younger kids to bands like Deftones and Limp Bizkit, keeping them as big names. You don't see that with with older metal like thrash or the more classic bands like Sabbath, Priest, Maiden, etc. Those are all nostalgia acts with old fanbases.