I think that is a better idea than demanding everyone ditching all wikis.

Dokuwiki for example has a sane, plain text format. It can be extended relatively easily compared to Confluence (I have tried both).

Unlike certain other wikis it has access control and unlike Confluence you can edit a single paragraph or section at a time.

And finally, it is actually a wiki, wiki originally meant "quick" I think and I think calling Confluence a wiki in that context is somewhat ironic.