Imagine a storygame with a detailed plot which has multiple characters that you can play through, with possibly the choice of which character you want to start with.
Now consider this. Character death is possible, but with a catch - as soon as your current character dies, the story continues and you change to one of the other characters, continuing the story.
Of course, the plot would have changed drastically, since one of the main characters is no longer there to affect various events. There's also the possibility that some character routes will always lead to death (because they're meant to die, or because a character who could have saved them has already died as a result of your decisions). If a player survives a character's route long enough, however, then their "chapter" has finished, at least for the moment, and you can move on to one of the other characters to continue the story.
Thinking about this, it sounds pretty complicated depending on how many characters you have and may well lead the reader to experiment with multiple character deaths to see how they affect the story. Perhaps some good endings could only be reached by deliberately killing off a character who might have otherwise survived.
What are your thoughts on this, and how feasible is it? I don't know if something like this already exists, but I haven't seen one in a detailed storygame so far. It could potentially place greater emphasis on the urgency of survival and how each character is directly connected to the main storyline.