> You can generate a heavy metal song that is actually heavy metal, same with other genres that have been destroyed, or the kind of music that just isn't being made anymore.

Or just listen to any of the easily available fantastic metal albums released in the past year? I could see the argument for incredibly niche genres (though in the age of Bandcamp I'd love to see a genre that doesn't have at least a few artists producing music for it) but there's plenty of heavy metal being made these days in both the general and the traditional (i.e. the heavy metal genre versus general metal genre) sense.