completly agree. My cd decks have been stolen so many times it's ridiculous but thieves don't seem too interested in my tape deck (which plays my mp3's through that 'old school' adapter thing)
Although sateltite radio is a major contender too, alot of people don't mind or prefer having playlists controlled by someone else.
Now they just need to come out with a generation of head units that securley hold your ipod or whatever while controlling it,