There are more than 100,000+ forums on the internet according to one of Quora's answers from 2015. I don't know if it is true, but I believe the majority of them don't get much engagement and are still relevant. Forums occupy specific niches and have been around for years, some even decades. So by now their core audiences have probably reached their limits of interest.
I still enjoy using some forums like Slowtwitch, which is a triathlon focused forum. In general, I mostly lurk around in forums and rarely post. When I do post, I find it painful to deal with ancient bulletin board software and moderation policies that differ from one forum to another. But, I put up with it, knowing there are people just like me waiting to discuss topical issues and give advice on the matters.
Reddit has more than 130K subreddits and is taking over many of the niches that forums once occupied. Facebook groups are growing like crazy in even more specific interests. In the world of these giants do forums still have future?..
Which forums do you find interesting and why?