Bolded, is what I experienced with losing my Mom. So much is "fight, fight, be positive, fight." But you can't will cancer to go away. The day my Mom died, my Dad admitted he didn't believe she would die. That there would be a miracle. So there were conversations that didn't happen, that should have. So that's why my posts on Rodeo's thread were always along the lines of "prepare for the worst." If he is that 1 in a small number, that makes it, the preparation didn't hurt anything. But if it doesn't go the way everyone wants, at least there is the tiniest bit of still having a sense of control to hold onto.
My first post to Rodeo I said to record his voice, because it's not always that simple to get voicemails transferred and safely saved. Then I saw her post, after, about having a single voicemail. So I'll tell you the same. Use a computer, tablet, audio recording on the phone, have him record something..stories, jokes, stupid comments that have meaning to your family, whatever. Even if you never listen to it, because it's very hard to keep back the tears...you know it's there.
I suppose the silver lining, if there can be any, to Rodeo's story is that you know how fast things can completely go downhill. Even when time is running out, you think there will be just a little more. And sometimes that's not what happens. But both you and Rodeo know that you are not alone.
Virtual hugs and positive energy coming your way.