Well, there are some metal genres that rely heavily on fingerpicked classical guitars in the verses and go for heavier riffs in the chorus and so on.
It's just that
slide, fingerstyle, fingerpicking etc differ only in technique, not so much in musical ways! Yes, some techniques are more applied in some genres than others, but the differences between genres are mainly musical. Just as there is one "Playing the guitar" forum and one "The workings of music" forum!