Finally, flatMap is here. I really hope there could be syntactic sugar like do expression in Haskell, for in Scala, and LinQ in C# for flatMap instead of type

Finally, flatMap is here. I really hope there could be syntactic sugar like do expression in Haskell, for in Scala, and LinQ in C# for flatMap instead of type limited version like async await. Another thing is pipe operator seems to be very welcome among the proposals. There will be no awkward .pipe(map(f), tap(g)) in RxJS since then.