Thesis: the real reason there was a falling-out between the high elves and the dark elves is that the high elves are stuck in the Baroque era while the dark elves have discovered glam rock.
The question I have is this: at what point in musical evolution are the dwarves?
Both the mountain dwarves and the duergar/gray dwarves are into excessively dramatic choral music, but in their case it’s the other way ‘round, and it’s the creepy, allegedly “evil” ones who are stuck in the past. Gray dwarves are all about ponderously chanted hymns in the Gregorian mode, while the musical traditions of the mountain dwarves most closely resemble Appalachian ballads – you know, the really grandly morose kind that are all about mining disasters and the kids who didn’t come home from the War.