It's gone now that everybody has a pocket supercomputer, but it's stunning just how far it went in completely changing the way we relate to music, and audio in general.
I don't think it changed the way I relate to music at all, it was just one more step in the ladder. I had a walkman before I had CD player before I had a MiniDisk Player before I had an iPod before I had Spotify.
To me the iPod and iTunes around 2006 were there peak of my interaction with music. Before or after everything has been worse.
I've seriously considered building my own music hardware company just to recapture a few features and UX experiences which for me at least made music a much bigger part of my life.