Out of the twenty five core members of my Homegroup when I first attended 35 years ago I know of 10 others who are still sober and active in AA. One woman has struggle most of that time but now has three years. Three I know died. Two passed on sober. the rest have moved or moved on and I don't know where they are.
So, I don't know the answer to your question. I just know that AA works if you work and live the 12 steps.