Heavy metal purism tends to be more prevalent among younger metalheads, especially black metal fans. Practitioners of heavy metal purism are sometimes referred to as heavy metal purists.
Also often referred to as "metal purism" or "metal-purism"
“Sometimes we didn’t know quite what they had in mind,” adds Fredrik. “But in the end it all made sense.
Did it go against any ‘heavy metal purism’ you might have had?
“Haha, no,” he laughs. “Good stuff is good stuff, and bad stuff is bad stuff. They do it right. I think many bands will follow them.”