I see many questions and answers with a vote score of zero, even after years. (I see this on other SE sites also.) Sometimes I see -1 scores, so I know people are downvoting. But why don't they vote early and often? I do. If I even read something, I almost always upvote. (It makes it easy to see what I have read before.)
Is there some reason people don't vote? It can't be inexperience, because I see questions and answers and comments by experienced people.