It's highly unlikely that Syd will die any time soon. I'm sure that if he were to die first, it wouldn't really matter, because the rest of them would be so old anyways. This whole situation is highly unlikely anyways, given that Syd is the youngest of the bunch.

__________________
"You hear the night birds calling you,
But you can't catch the words they say,
Close ears and eyes,
Be on your way"

-The Narrow Way