To ensure continued access to your content, we strongly recommend that customers archive their library to audio CDs and/or make a backup using SonicStage.
Translation: You can continue to "enjoy" "your" music until you get a new PC or a new music player. And really, why would you want a new PC or a new music player ever again? Surely your three-year-old ATRAC player will never be truly obsolete! Link (Thanks, Stephen!)