FWIW, I've been so scattered and unable to concentrate lately that somebody posting as a WIP recently actually has been the only way I managed to finish a novel-length fanfic, because it came in smaller parts that prodded me. Meanwhile I abandoned (to now anyway) several finished long stories, not because I disliked them, but because I stopped reading after a bit, and then somehow couldn't make myself pick them up again, even though you'd think once something is finished you could just read in smaller chunks on your own, only apparently not always.