> It goes beyond a foldable, can be applied to streams.

> Clojure had foldables, called reducers, this was generalized further when core.async came along - transducers can be attached to core async channels and also used in places where reducers were used.

Ok, you mean there's a distinction between foldables and the effectful and/or infinite streams, so there's natural divide between them in terms of interfaces such as (for instance) `Foldable f` and `Stream f e` where `e` is the effect context. It's a fair distinction, however, I guess my overall point is that they all have applicability within the same kind of folding algorithms that don't need a separate notion of "a composing object that's called a transducer" if you hop your Clojure practice onto Haskell runtime where transformations are lazy by default.