John Erling Blad wrote:
It works by counting the visitors that reads a particular segment of the article, and then will accept the particular segment as correct when a sufficient number of visitors has been visiting.
How do you count visitors to segments? There are now available statistics for visitors to articles, but that doesn't go down to segment level. It is also much harder to determine edits on the segment level, than to just count edits per article. Is it really worth the extra effort?