User blog comment:MisterWoodhouse/Fandom is upgrading to a modern version of MediaWiki/@comment-39127-20190627045051/@comment-3020860-20190630010522

Re: The interactive ads, https://en.wikipedia.org/wiki/UBlock_Origin #JustSayNo to intrusive content that burns up your computing resources.

As far as the "more professional" look... I suppose I agree, but I also see why that might be exactly the reason not to use it here. Wikipedia IS more professional, in both focus and organization. Wikia has focused on entertainment-related content, so it arguably makes sense that it has a less "stuffy" design.