GuitarStv
Sock Market Trader
I’d say metal has tons of dynamics—maybe even more than jazz or blues in some cases. Techniques like palm muting (not just for heavy chords but also in solos), tapping that needs a delicate touch, and using high-gain amps where harmonics are way more intense all play a big part in shaping your sound. Controlling those harmonics and using feedback creatively is basically its own art form.
When it comes to dynamic metal players, Tony Iommi pretty much wrote the book on switching between quietly eerie chords and bone-crushing riffs. Randy Rhoads threw in his classical influences, making his solos rise and fall dramatically. Then there’s Dimebag Darrell, John Petrucci, and Marty Friedman, who blend softer sections with massive, distortion-heavy passages without ever losing their musicality.
I’ve played jazz, blues, and metal myself, and I can tell you that paying attention to dynamics really makes your playing stand out. Of course, there are still metal guitarists who just stomp on a pedal and go full blast—just like some jazz or blues players who stick to the same sound during an entire recording or their whole career. Ultimately, it’s not about the genre; it’s about whether you, as a player, want to explore every level of volume and tone your guitar can handle.
I think we're running with different definitions here.
Dynamics is difference in volume between the loudest and quietest sounds. As soon as stuff starts distorting (or you use compression) you are limiting dynamics. Once you have a very heavily saturated tone, there is typically almost nothing left as far as dynamics go. Clean to edge of breakup tones let you significantly alter the volume of the guitar with your touch on the strings, folks who play with these tones tend to be better at using this to good effect in their music.
What you're calling 'dynamics' is what I think of as touch sensitivity - it's the ability to get different sounds/tones from an instrument by varying your touch. Palm muting vs playing raging open chords give different sounds, but with a gained out guitar there isn't much in the way of dynamic range. Touch is super important, and paying attention to it really makes some folks playing stand out . . . and I'd say that people who play high gain all the time typically have a better handle on this.