This might sound stupid but what happens when Steven dies

Before I start I just wanna say I haven’t been involved completely in the Steven universe lore or paid attention that much I know a substantial amount about Steven universe lore. We know Steven grows older, and he heals quickly I think, what happens when he dies. We know he’s half human and half gem. The gems don’t age and don’t die unless they’re shattered which we seen in Steven universe future that won’t even completely kill them, so what happens when Steven reaches old age ? Or at a certain point he just stop growing ? Does anybody have an answer or a theory to this question.