I think this is a compelling vision, but as a practitioner of functional core/imperative shell, I make use of the async/await keywords to understand where I/O i

I think this is a compelling vision, but as a practitioner of functional core/imperative shell, I make use of the async/await keywords to understand where I/O is happening and to work towards moving it to the edges of my program. I can do this without those keywords, but there's actually something quite nice about being certain that a given function does no I/O simply based on its function signature.