An idea that keeps coming up (most recently #323, feel free to edit this post to point to other instances) is "readable stream with ack," i.e., one that not only lets you read(), but also lets you acknowledge when you're done with a chunk.

The most compelling case for this has to do with buffer re-use (e.g. #323). It also gives some symmetry with writable streams' two-signals approach (but see #316).

However, I find it basically impossible to envision author code using this correctly and consistently. @tyoshino, could you help illustrate some author code that operates like this?