Visiting him during his decline, it reminded me of both of my parents and, so help me, little Pepito, our ancient chihuahua who we recently had to put down. In all cases, living became exhausting. Death was a relief. In no case did the patient fight all that hard to keep going. Chuck was the only one of the four with cancer, but the final declines seemed similar.
I've heard that those who fight disease and decline last the longest and I guess this supports that notion.
Rest in peace, Chuck.