How big of an abuser was she? I bring up Eddy Guerrero with his addictions having caught up with him, despite cleaning up. Karen Carpenter also died despite having recovered from her eating disorder. Carrie was a heavy drinker too, if I recall correctly. She seemed to have stayed clean over the past half decade.
Presumably she had some history with it, how much I don't know nor do I need to know. It is besides the point. Your statistical chances are based on cumulative use and the cards you started with (even though we don't know those directly), where every amount of abuse counts towards decreasing your odds on the longest possible life (and in best health) you could have.
However, since 'abuse' is typically a problematic level of (over)consumption, those periods have far more impact than regular usage, since there is irreversible damage being done during those periods, and that damage may lead to or somehow trigger earlier mortality. We don't know how that actually works, but the statistics are obvious: the more substances you use, the likelier you are to die sooner than someone who doesn't (which would be log odds when phrased like this). Whether or not you do, is a matter of luck. But that mostly means avoiding critical escalations, like attacks.
A person's best chance at maximum lifespan is just not using substances at all. Whether that is a fulfilling life, is a personal and cultural question.
I apologize if this is inappropriate for this thread though.