I'm a member of two 'old-school' forums (both built with xenoforo, though), both I've joined 1 and 2 years ago. Both are niche communities and you can find ther

I'm a member of two 'old-school' forums (both built with xenoforo, though), both I've joined 1 and 2 years ago. Both are niche communities and you can find there long-form discussion relevant to the interest of the forums (and then some shitposting, because internet). So old school are still alive, but I can't say how they are evolving. There's also that story on the front page (https://news.ycombinator.com/item?id=19717717 https://news.ycombinator.com/item?id=19717717), again about a niche forum (astronomy).