Actually, according to the the story that Isaacson and others familiar with the situation told, it's fairly certain that he would have made a full recovery. Of course it's possible that he would have died by now due to other causes - his plane could have crashed etc - but he would not have died as a result of cancer. In this case, his belief in alternative medicine killed him.
The version of pancreatic cancer he had was actually the one that was very curable. For all of his intelligence, he chose poorly, and paid for it with his life.
