Fors down sounds like a bad advice, and the rationale for it seems to be The Root of all Evil. "Fors up" allows for composition, e.g. map. Fors down makes it c

Fors down sounds like a bad advice, and the rationale for it seems to be The Root of all Evil. "Fors up" allows for composition, e.g. map. Fors down makes it clunky at best.