Featherstich

Yes, I'd be keen to see an article on Featherstich. The article on soft updates was good to see here too; I'd read the original paper on soft updates and admired the approach taken even though it seemed to have a "Level of Difficulty == Superhuman". But there are many problems in computer science like that (write a modern operating system in assembly language, anyone?), for which the computer science answer is another layer of abstraction (and tools to translate back to the lower levels). It feels like that's what we need here too: a way to express the dependency graph of all the operations such that both the code to do it, and the code to track the order in which things hit disk, is auto-generated.

Ewen