It seems to me like most of the progress in rock is happening at the fringes, particularly in metal. The folk-metal (both european "celtic/viking" and particul

It seems to me like most of the progress in rock is happening at the fringes, particularly in metal. The folk-metal (both european "celtic/viking" and particularly "southern sludge"), jazz-influenced progressive metal, and hybrid instrumental/electronic djent genres are all breaking significant new ground.