this is a absolute requirement for any enterprise-class wiki product. the lack of this feature is one of the main reasons why wiki’s have fallen out of favor with many enterprises. I whole heartedly agree with this feature request. If you are concerned about scalability of the navigation, just create a hierarchical tree at the left instead of tabs at the top.

Agreed. Specifically if chats, wiki pages, and discussions (hopefully in the future) had the ability to be ‘open’ meaning waiting on more interaction or input from the group OR ‘complete’ meaning no additional information is needed from the group, but can be added optionally….then you could know where your input may be needed across your groups with an ‘inbox’.