I have a broad sense that AI safety thinking has evolved a bunch over the years, and I think it would be cool to have a retrospective of "here are some concrete things that used to be pretty central that we now think are either incorrect or at least incorrectly focused"
Of course it's hard enough to get a broad overview of what everyone thinks now, let alone what they used to think but discarded.
(this is probably also useful outside of AI safety, but I think it would be most useful there)