Probably not. They are heavy metal punk rockers, aren't they?
Yeah, their music is pretty cool.
Classifications are in our head at the end of the day.
I remember when I was listening to Simon & Garfunkel, a bloke said they are country musicians.
I think their music is unique. Metallica probably falls into a unique category as well.
I used to listen to Metallica & Red Hot Chili Peppers all the time when I was kid.