I just added an intriguing update to one of my old write-ups from 2004: Nodding syndrome. It looks like the mystery is finally solved.
It would be neat if E2 had a module for updated write-ups - significant and/or important updates to factual nodes. Or perhaps an option to add an update: not technically another write-up in the node, but an addendum, perhaps, that shows up in New Writeups? For instance, in this example, you'd see in New Writeups: "UPDATE: Nodding Syndrome."
It'd be cool to have a way for people to notice major updates to old nodes, especially in cases like medical mysteries, like nodding syndrome.