Originally Posted by zegna

I definitely agree with the part in bold.

But the rest of your post looks to be total bull. First, Iommi didn't lose a finger but the tips of two fingers on his right hand (middle and ring, I think). He played left-handed. The plastic finger tips he created had nothing to do with the way he hit chords since they were on his fret hand. And, in any case, it's generally the progressions themselves (chromatic, tritone, modal scale), which gives metal its character, not just how the chords are hit.

Next, you'll be saying that his plastic finger tips gave birth to palm-muting (or pizzicato)...