Completely agree.

I've managed to develop several smart playlists that keep my music fresh, especially old favorites.

I have a Current playlist that keeps all my podcasts in line to listen to, but if they get too old unlistened, out they go. Yet, two hours of them can still be available, in order, for me to listen to the unlistened ones.

iTunes is the shiznit. Or whatever.

Additionally, storage is not [usually] the most limiting factor; battery life is.