Here's two things that bug me about phones.
One, we can't routinely share files directly, phone to phone. You're playing a song, I like it, you send it to me.
Two, no one notices this. This is worse.
There's world's of shit that would have followed from this. You share playlists with a friend. Phone: "do you want me to put them side by side and compare?"
Organize, compare, track, tag, groups...
Songs, spreadsheets, documents whatever.
Palm Pilots, even, could do the basics. It's been taken from us.
And the worst part, no one notices of asks for such.
Copyright and IP is not involved in responses. That's a corporate issue not a human one.