Why Wikis instead of emails

Christine's Question - "Why Wikis instead of emails?"

• Signal-to-noise difference. Not everyone is interested in every issue on every format.
• Efficiency in reading. You can read one wiki page to get the status/thread of an issue whereas with emails you often have to read thru numerous emails (and threads) and apply them in your head to understand where an issue etc. ended up.
• Search/discoverability.  Search for the web/wikis works much better in practice than searching mailing lists.
• Public domain. Wiki contributions are required public domain, while in email there is no enforcement, thus email should be used only "informatively" for notifications and never for capturing material of any substance.