Such a world is utterly dominated by the worlds in which you are kept conscious, but nobody else is. If QI keeps you conscious for a billion years, you'll be alone.
(I keep typing "you are kept alive", but that's not the promise. Only conscious. Being "alive" will be extraneous to that.)
(I keep typing "you are kept alive", but that's not the promise. Only conscious. Being "alive" will be extraneous to that.)