Board Thread:Technical Updates/@comment-24006128-20200409180352/@comment-9605025-20200411034715

Exactly as Himmalerin said. Fandom actually tried several of their own platforms and they all crash and burned. Fandom's current version of MediaWiki is heavily modified and based on a very old version. So at this point, it is essentially a custom platform. UCP does away with this platform and changes over to a more standard and more current version of MediaWiki.

That doesn't mean I won't miss wikitext support in discussions. In fact, I will miss it very much. However, the general train of thought is that, on the whole, the loss of wikitext in that particular aspect is acceptable in exchange for the immediate and continued improvements that updating MediaWiki will bring to pretty much everything else.

On top of all of that, you are about 4 years too late. This decision was made years ago.