User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-39028844-20200527105018/@comment-24006128-20200527121855

On the legacy platform, Forums, Message Wall, and Article Comments are all built on custom code within MediaWiki. Such customizations of the core software are part of the problem which has prevented us from updating the platform in the past. We moved all three features to Feeds, which is not custom MediaWiki code, to solve that problem for the future. The trade-off is the loss of wikitext support, as Feeds is not MediaWiki. That's why we're exploring advanced formatting for Feeds-based features.