Mediawiki as a whole has a feature set that 95% of organizations will only scratch the surface of. There's a ridiculous number of possible plugins and customization if you have somebody who knows what they're doing with it.
The majority of companies that need an internal KB/wiki do not have as complex needs or use cases as wikipedia itself or the wikimedia foundation.
Turns out no matter how much better the thing is, the users have to know what they're doing more than the operators do.
https://www.mediawiki.org/wiki/VisualEditor
It's the same GUI WYSIWYG interface you get by default if editing a page on public wikipedia.
Also VisualEditor sucks if you've never used VisualEditor before and sucks even more for anything complicated. This is the kind of tonedeafness non-technical users get to their feedback all the time.