Im not sure, but sometimes it feels they loosing interest in what theyre doing, maybe they burn themselves out, dont know where to go with the game and maybe are to embarassed to speak out about it.
Hand-drawn can be super good, if done right, sadly there are not that many games that actually do have "good" art, i guess its preference in the end but it does feel like that to me.
I dont think it came ever to my mind to even TRY and count them, its way to much, thats pretty much it. "Pig Princess" is on my fav list since quite some time tho. The art is really great.