If Jack hadn't died, and if Jack had responded to Ennis's last postcard that, yes, he would meet him in November, perhaps they would have continued their last conversation ( argument) and something might have been settled. Maybe, at long last, Ennis would have capitulated, partly, if not fully, and made some more satisfactory arrangements with Jack. Of course, with Jack dead, this is a mute point. We can only conjecture about this. But, I still feel that nothing short of death would have split them totally and permanently. Given enough time without Jack, I believe Ennis would have compromised.