Yes, there was also a recent report [1] about the current state of Multicore. Ap...

Yes, there was also a recent report [1] about the current state of Multicore. Apart from some unsolved problems the two largest problem now are 1) it's not in the mainline yet 2) lack of support in standard/third-party libraries. Sadly, it might take quite a while for ecosystem to catch up. Haskell has a similar problem with Linear Types[2][3].