In support of your point, TIMTOWTDI. Half a dozen subtly different posts may use essentially the same algorithm, but all use different idioms and/or coding styles, different parts of each being clear to the reader. By comparing different answers where something is unclear, a reader may be able to grasp quickly something that otherwise would require more time and effort to comprehend. I've certainly found that to be the case - one (later) post using techniques I'm familiar with clarifying earlier posts that didn't.