> Its only good at basics and cannot handle complex information well.

Poppycock! Because of MediaWiki's multimedia capabilities it can handle complex information just fine, obviously much better than printed predecessors. What you mean is a Wiki's focus, which can take the form of a generalized or universal encylopedia (e. g. Wikipedia), or a specialized one, or a free-form one (Wikipedia, in practice, again). Wikipedias even negotiate integration of different information streams, e. g. up-to-date news-like information, both in the lemmata (often a huge problem, i. e. "newstickeritis"), in its own news wiki (Wikinews), or the English Wikipedia's newspaper, The Signpost.

And to take care of another utterly bizarre comment: Encylopedias are always, per defintion, also repositories of knowledge.