Fediverse

Article claims the forums were expensive and difficult to maintain. I thing it more likely that Facebook groups are epopular because people are already there.

Discord has done an amazing job at convenience. It's free, they have a rather generous API. The communities have created fantastic bots. But it's important to remember discord isn't a forum it's a live chat. Two people having a live discussion is a very different thing than two people carefully curating their responses in a forum.

Reddit and Lemmy are curated knowledge repository wrapped in discourse. Which brings an advantage over old forums.

More or less I would argue that the article is missing convenience as a driving factor.

Edit: I poorly skimmed this article and mistook some of its points. This comment deserves no upvotes and I'll circle back later and give some credible feedback.