I guess it's a matter of taste, for me reading the generics and big picture first is more important than the details. Maybe it's my programming skills, but my files start with some five or ten string manipulation utilities and helpers. I honestly do not even care about their implementation, a name would suffice. Which is why I also like `where` approach much more than `let ... in`: it allows you to read the general idea, postponing the details to later (if you want to go into them).

However, I agree on laziness, operators and point-free.