Going absolutely no contact is a bad idea in most cases. My suggestion is to make occasional attempts as long as he's alive, how often is up to you, maybe only once every few years. Why? Because people DO change, do grow, and do learn throughout their lives.

Give him a chance once in a while, he'll die eventually, and then it will be too late, and you'll wonder if maybe you should have given him one more chance, instead of ignoring him for decades, or whatever. Just go into it with no expectations.