Key pair in the APU cant be chained, granted, but the boot chain that uses them can be, change the boot chain and you change the way the same key can interact.
Its blockable, but the moment code to do this on a non-patched console is released, the damage will be done, downgrades, hacks, modded lobbies, the usual fare.
But more appropriately, review copy games hitting torrents/usenet days/weeks before release and pretty much every major games plot points being spoiled.







