For a reasonable price. I am willing to say that very few members of the 13-21 age group actually purchase every single one of their favorite cds. They are just as likely to procure their music from places like Napster, just as the 21-30 age group dubbed their friends tapes. That is what has the entertainment industry scared. Companies that make digital blank tapes and blank CDs for recording music pay royalties to the recording industry.
Libraries also buy the books and tapes that are on the shelves.
So there is some compensation to the creators. And in the analog world, borrowers and tapers do not get an exact copy of the original. The RIAA argues that in encourages copyright infringement. Napster argues that neither it nor its users are infringing. Someone has to be wrong and that is what the court, presumably will decide.