Some questions, and some answers, have recently been inordinately long. Wouldn’t it be a good idea to impose a maximum number of words for each, just as there is a minimum number of words for answers and comments?
I downvoted this question because I don't think ELU should automatically and unilaterally restrict question/answer length - but I do think it's a good question that's well worth raising here on meta.
On rare occasions I've downvoted an inordinately long question or answer where I wouldn't have if it had said the same thing more succinctly. Not that I'd downvote because it was too long (I upvote lots of long answers). It's just one more consideration that might potentially tip the balance for me.
I'm sure many if not most voters take into account the ratio between length and useful content, so it seems to me our votes are already an adequate mechanism for discouraging the worst excesses.
Nothing prevents the reader from leaving off in the middle of a question or answer if it doesn't maintain interest. Nevertheless, someone else might find all that detail fascinating. Not all questions can be adequately explored by a quick C&P from the OED.
Please forgive my long answers. I don't always have time for a short one.