There is nothing different, I do not trust apple of course, the problem with music is that sometimes I don't want to buy the whole album because I may like only 1 track from that album. Why should I pay for the rest of the tracks that could be garbage (for my taste)? So they are giving me the opportunity to pay less and get what I want. In Gaming Industry there is no such a thing.
You just buy the games you want that’s the difference.
So in the same light you’re saying about loosing your game collection you could loose your whole music collection the same way.
Me personally I buy music digitally, films digitally and games digitally. Had no issue with any (so far) plus my family can access the collection if they are away from home or in their rooms. It’s the way forward.
I have ne er traded in games and still have a big collection of SNES, GameCube , PS1, N64, Xbox 360 games plus more. I just like digital these days