The problem is that while you can introduce FP abstractions to structure your programs, they are not the same abstractions that you use in the synchronous (impe

The problem is that while you can introduce FP abstractions to structure your programs, they are not the same abstractions that you use in the synchronous (imperative) code. You still end up in a situation where your programs is written in two colors that don't play nice with one another (for example, a "foreach" combinator doesn't work on both sync callbacks and async callbacks)