At the time (initial release circa 2009) there simply wasn't an easy to use Wiki for non-techs. I prioritized easy-of-use within an attractive, engaging, & intuitive interface. Why? Because it's regular engagement and contribution that makes or breaks a wiki.
The wiki pages allow user comments and have team-level access protection. There's a code syntax highlighting version of this Wiki for software & IT teams. This module is fully integrated into a back-office suite comprising 14 apps and full content-management-system.