Some of us are more organized than others. Some have our future posts already written and scheduled out a month in advance.
While I can’t claim to be one of those, here at WPMU DEV, we do use the scheduled post option in WordPress quite a lot. In fact, it’s rare that any post here will be written and then published straight away.
I’d say that about 98-99% of the posts you see here have been scheduled to publish. And so we surely appreciate that function.