Off hand, I don't believe I have made one elaborate post that I have not gone back and edited at a later time to add detail, clarify a point, etc. Some topics, like my 'Lost items' post, get updated with new information periodically. When I did a few calculations on the benefits of the Wisdom skill, a couple of points were brought up causing me to try some other variations, which I added to the original post. If this information was spread out over three or more posts throughout the topic, it would make it much harder to get an overview of the skill.
Having to reply to the topic to make additions or corrections is messy, unorganized and will detract from the usefulness of the forum.