Just reached the 38K position in the new Dawes novel. Forty thousand always has been a relatively difficult barrier to overcome. I don't know whether I've programmed myself to lose the thread of the story when that barrier appears or whether it's the summing up of the character mix intertwined with a plot that doesn't always appear to be ready to make the leap to 41K and beyond.
In the past it has taken tenacity and the will to stare at the blank page until enough thoughts have coalesced so that the path to the end of the story appears and reduces the next 20K to a doable run. So, we'll see said the blind man.