What is "good" music?

Sound is a law, not Music. Music is the culmination of specific sounds in a specific order in a specific timing.

And that's the point I was trying to make, yes. Sound will keep existing as long as particles vibrate. And in case they don't, we'd be fucked anyways, since that'd mean the whole universe is frozen at 0 K.

That timing depends on people. Not universal forces.