Multi threaded + async isn't a problem if the runtime system supports it. Async + Event driven works transparently with higher order frp with the usual tradeof

Multi threaded + async isn't a problem if the runtime system supports it. Async + Event driven works transparently with higher order frp with the usual tradeoffs of first order vs higher order frp. Multi threaded + Event driven seems like a mess as soon as state gets involved. Some transaction based system might be interesting.