Also, is there any centralized forum that is more active than the Threadiverse (Lemmy/Piefed/Pylova/Mbin)?
It looks like there are on the order of maybe 20-30k total monthly active users of the threadiverse, though I had to cobble this together from a few sources, so if you have any solid numbers I’d love to see them.
As much drama as there is/was, the Something Awful Forums are a Web 1.0 old school centralized forum which has been around for over a quarter of a century and is still going. At their peak they had hundreds of thousands of users.
I don’t think the argument that in order to host a large forum, you need to be decentralized holds any water. I know you’re not directly making that argument but I’ve seen others make it in their replies.