I've used Parsec before and it is certainly nice. Honestly I think it's a bit weird to try and shoehorn it into C, but hey maybe something interesting will come out of it.
What bugs me is the suggestion that just because bison works well enough, nobody should try and make a new parser generator in C. They will probably not take over the wold, bison is big and battle tested after all, but bison is itself also a replacement for older tools. And hey, maybe mpc here will succeed and revolutionize parsing for the best; then we can have this discussion again in 20 years about someone attempting to replace it.