Several years ago I brewed a sweet stout with cascades just to see and it turned out pretty good.Last year I used Palisade in my Cranberry Chocolate Stout, same brew this year but I gave cascade a go this year. Won't have any feedback for you for a while though.
I had a sample tonight when checking gravity, of course warm and flat it is hard to tell, but it tasted pretty good. Put about 500ml into a pop bottle and hit it with 30 PSI, tomorrow will be a better barometer.Several years ago I brewed a sweet stout with cascades just to see and it turned out pretty good.