Ok, so in my case it probably helps that I already have an au in my head, where Cam Mitchell is one of the guys who nearly bombed John and comes to see him, and they get friendly and end up on sg1 or whatever together. Because Cam's exactly the kind of guy who'd want to help John, and he didn't show up in the episode to be a dick to John.

So it's easier for me to imagine that he could be happier in a future where he doesn't die.