Chapter cliffhangers are fun! I want to be engaged and wonder what will happen next. If the story itself ends on a cliffhanger... I guess that kinda depends. Is it setting up for a sequel? Is the author leaning into ambiguity? Both can work if the author can pull it off. I don't think I would drop a fic for cliffhangers; I usually drop fics when I stop caring about the story/characters, or reading the story feels more like a chore than something fun that I look forward to.