There was an article posted on the Forum a few weeks ago about an Indian grower who is the Johnny Appleseed of jackfruits. The article mentioned that, in India, grafted jackfruits do not live very long (I am not going to search for the article but I think it said 10-15 years). I wonder if all the problems you all are mentioning contribute to a short lifespan for grafted trees, even the ones where the grafts do take.