User blog comment:MisterWoodhouse/An update on the Forum retirement plan/@comment-39820823-20191217235215/@comment-168424-20191218003937

Part of the reason is that FANDOM dev is severely lacking in MediaWiki engine expertise (see this reply for a reason). If they had more expertise, Forum wouldn't have had as many problems as it has. However, one can never discount just REALLY BAD planning. Form what I can tell, Discussions suffers from almost as bad planning, but it does at least serve the mobile-friendly goal decently. Other than that it kinda sucks.