That's one of the big points of contention, for me. If I am purchasing a digital copy of your content, then I am essentially purchasing nothing but a license to

That's one of the big points of contention, for me. If I am purchasing a digital copy of your content, then I am essentially purchasing nothing but a license to use that content and it should therefore be your job to ensure I can continue to access that content for the rest of my life (or longer, if we figure out the whole management of digital copies of things so I can give my library to my nephew when I die or something). When you are changing the physical media, it's a little more understandable (even though you're still really just giving me a license to the content on it and nothing else). When it's already in digital format, it's no longer acceptable to play that sucker's game, as far as I'm concerned.