Every time I reach for Data.Function.on, I feel like a total dolt for having to import a module to get a function whose implementation is barely longer than the import. And it's a really good function too! Can we please add it to the Prelude?
Agreed. This function makes only sense to have if the cost of getting it into scope doesn't outweigh its benefit and therefore I support this proposal which makes a lot more sense than the pointless singleton proposal.