What a life Noah must have led. Of course, most accounts of his life focus on the events leading up to the flood, but think about what he saw after that.
By the time of Abraham, people had migrated from Ararat to every corner of the Earth. They had changed from a single, monoglot, family to become people of all races, speaking all the languages of men. There were millions of people on the Earth by then, and every last one of them was his descendant. Not all was happiness for him. He had seen every last human being except for the eight on the ark destroyed for their wickedness, and yet he had watched as more and more of his descendants turned away from the worship of the Lord, falling into pagan practice, until his religion was found only in one small corner of the world. Of course, the religion wasn't all that well established, because the next covenant wouldn't be made until shortly after his death, but most of the world was polytheistic and had forgotten the flood that he had lived through.
I wonder if he tried to preach to them and warn them, first as they built the Tower at Babel, and later as they turned away from God altogether and invented new systems of religion, or did he just sit back and realize, as God had told him so long before, that the race of men was truly wicked, and that he should be happy that at least a few of his millions of offspring were faithful to the Lord? Undoubtedly God would, in his own time, reveal more and more. Did he know that the first of his desendants to outlive him would be the one whom God chose to form the new covenant?
And did any among his millions of family know who he was? Did they recognize him as the second father of the human race, or was he an obscure old man, living somewhere in a cave, unknown to his children's children? I'm reminded of The Last Emperor, where the Emperor of All China, when asked who he was, replied "a gardener". Somewhere in Babylon had Noah landed a job as the royal zookeeper, where he kept quiet and simply observed as people wondered how he had learned so much about animal care?