it's not format I'm worried about, it's losing my music. I need to know I'll be able to freely copy my music, burn it to discs, transfer it to another computer if I ever get one, put it on a different mp3 player if I change, etc.
I don't know much about DRM but I gather apple are a bit sketchy for that stuff (yes/no?). In particular, will iTunes retroactively restrict the mp3s I already have? it hardly could, right?
I need someone to explain it to me.