( spoilers main) at what point do you think WOW is too hard to finish?

George had gone 13 years and 8 wildly successful tv series without publishing his 6th book.

Part of me doesn’t blame him for it. At this pout the story is too much gardening. It’s kind of gotten out of control. I don’t know how physically one could sort out all those threads and make a sixth book.

I wouldn’t be surprised if he just doesn’t know where to go. Could this be true?