"To reach our aspiration, we need to make changes to the service that are incompatible with our original Xbox v1 games."
This line is absolute BS. You never have to REMOVE WORKING pieces from software to add in new bits. This is like creating a game, and then telling people that "In order to offer a DX11 version of our game, we had no choice but to send out a patch that disables the DX9 version that everyone was already using."
Software functions don't do anything unless they are called - THAT'S THE POINT. If Microshaft wants to remove the original Xbox's online function in attempt to push 360 adoption, that's their business, but yesterday Halo 2 worked on Xbox live Gold (360) accounts.