It’s actually the most advanced forum software they could have chosen, but a lot of the features are less than obvious.
A few of the highlights: It’s easier on the moderators, it has thread cross-referencing features that are nonexistent in other forums, it has an amazing summary mode for extracting the gems out of threadnaughts, it has great embedding support, and a lot of other little things that take time to to find and get used to, but actually make for a better discussion platform, like @mentions.