I'd rather not have my music overlapped. I'm sure you'll say off switch, but I'd hate for my prefs to become corrupted and have one more thing to remember to reset. (Most of the keybinds I have are customized and not standard. When I lose my prefs, I must remember every key I set specifically or have to remember it passively.)
But either way, whatever would be chosen would likely cause controversy among users over "Oh it's great!" and "It sucks!" Then we'd also start getting tons of idiots making "Title screen song replacement!" add-ons that replace it with the stufftiest music imaginable.