Some of this is very good, and it's a good beginner's introduction, but there is significant misunderstanding about the applications of FRP and the actor model

Some of this is very good, and it's a good beginner's introduction, but there is significant misunderstanding about the applications of FRP and the actor model in the area of complex event processing. These are fertile areas of CS research (to which I made some small contribution in the CS department at Yale), not just "loosely coupled ideas" or industry buzzwords. They have real academic meaning, even if the terminology is sometimes co-opted to make unrelated software sound cutting edge.