Well, if we want to talk about dead things...
I've been going through the theory and composition threads and I found dozens of questions about chords, scales, major minor, progressions and so on.
A century ago some guys said the tonal system was dead, that Bach, Mozart, Beethoven, Wagner, Strauss had strained it out. There was no new progression to be made, no new chords, no harmonic frontier to conquer. So they found ways to crack the tonal system and compose out of it.
So...
Tonality is back, troubadours are back, minimalism is back, rock is back, disco is back, ridiculous sun glasses are back, democracy is back, the dark ages are back, glam is back, prog hippie psychedelic punk is back, neo-goth is back, Jesus is back (have you seen the free-hugs campaign?).
Every trend of human expression will come back eventually. It used to be an Apollonian - Dionysian oscillation. Today, with globalization and mass communication, things are back before they die out.
But we sure as hell AIN'T coming back, so I'm gonna keep listening those great rock bands before I'M dead.