there is one semi-downside to having all your files online and not having to do physical disc mgmt anymore.
a friend of mine told me this and it seems to ring true with me, too: we find ourselves not spending as much time 'with' the music in that we often will stop a song before its done and switch to another one - BECAUSE WE CAN!
this *has* changed my music listening habits. back in the LP days, if I went to the trouble of cleaning a disc (taking 5-10 minutes sometimes) you can be sure that I'm going to listen to the whole 'side' straight thru.
with cd's, it became less of an issue to 'interrupt' playback. but still, I was lazy and didn't want to walk across the room, eject the disc and find another I wanted to listen to. so I often let *that* disc run to completion before fetching another.
now that its all virtual files, I can setup playlists and never have to 'go find' some music. but I will stop playback on a song at the slightest whim where I never used to do that before.
so, there sort of was a change in playback style (for myself and also my friend) when shuffling thru collections became virtual instead of physical. its a change but not necessarily for the bad. but it was a change due to HOW the data was accessed.