Harry Potter and the Methods of Rationality just got several fascinating updates 13 years ago
I stumbled over this a few years back and decided not to start reading it until Yudkowsky stopped adding to it or at least chunked some subset of the chapters into one or more books. When I read fiction such as this I want there to be a clearly defined beginning and end to the story. Eternal soap-operas, even if clever, aren't for me.