User blog comment:Sarah Manley/Wikia's 1st Hack-a-thon/@comment-3267024-20110325102740/@comment-1997905-20110328140510

It would be much easier to implement version control software - but that would prevent you from editing if anyone was editing a page, which would make wikis vulnerable to attacks in which someone uses a bot script to open up umpteen edit windows, thus denying anyone from editing a page. The edit conflict screen is much better.