Omg YES. THANK YOU ZOS! I was always annoyed, listening to the awesome background music, only to have it disappear every 5 minutes when something attacked me. I really appreciate that we now don't have to do that anymore and can enjoy the new background music even as we go slaying round the map!
I also like that we can enable optional boss music independently , to warn us if we accidentally stumbled somewhere we shouldn't be...(because I uh....TOTALLY pay attention to my surroundings when farming nodes and...uh...NEVER just randomly fall into a world boss area...yeah...

)