The craziest thing to me is he was still posting up to the very end. I've seen this multiple times in end-stage cancers, my grandfather's pancreatic cancer, he seemed "fine" (other than looking incredibly sick) til the last ~12 hours or so - he was even doing some yard work the day or two before he died. He knew the entire time how much time was left, too. I don't know why I find this so crazy, other than I hope I never have to go through it - you're very aware of what's going on for a long, long time up until the end.
Glad he is no longer suffering.