I do like an expressive high-level encoding like that, but 1) I just needed a silly example to show what pipes are. In practice you would probably use higher-order library functions (or components) like group for the same thing. 2) In my experience, very compressed expressions can be hard to modify in certain directions. Practical stuff like printing, logging or storing progress every X seconds, which is a small modification in a for-loop, can be a hassle.