Shelly, think of it this way, it allows a user to do a fresh install of the OS but still easily migrate over old files that are not tied to the OS structure. So if you had say 100gigs of music and didn't want to have to offload it and then reload it that would be pretty darn convenient. Honestly, I think it's one of the things they've now gotten right, they just need to explain what the heck it is so folks know they can delete it if they don't have a use for it.