Well, if that is your "concern", then perhaps purchasing everything is a better idea for you. For me - the ability to have access to lots of albums and artists that I never collected or really listened to before is more important than worrying about if Apple will cancel AM.Regarding your first question, it's a simple as nothing lasts forever. Eventually the service will shut down, or will migrate into something else, or an album or artist that I like will be retired from the catalog.