Thread:Tupka217/@comment-44397868-20200517200628/@comment-1038387-20200517205110

Forums is, code wise, a monstrosity. It is such a hack of the software it was holding any upgrade hostage, as it were. It had a lot of issues under the hood. So for its replacement, they decided to start from the ground up without using MediaWiki.

My guess is because anonymous editing is a distinctly MediaWiki thing, it's difficult to add to Feeds. But I'm not the best person to ask.