Changes

* '''''Soft Rock''''' - Examples: Rod Stewart, Bruno Mars, Billy Joel

* '''''Thrash Metal''''' - While Hair Metal took a pop-direction in the 80's, Thrash Metal took an underground direction, with less focus on catchy vocal hooks or even recognizable chorus sections. Thrash focused on speed, screamed vocals (sometimes even without pitch), and unsettling lyrical topics such as nuclear war and black magic. Guitar riffs were fast and often focused on chugging open string palm mutes. Examples: Metallica, Megadeth, Slayer, Exodus, Pantera