Hard to think of many, especially free and widely know ones to be honest. HN of course - but we are quite niche really. There are a few PHPBB type sites that a

Hard to think of many, especially free and widely know ones to be honest. HN of course - but we are quite niche really. There are a few PHPBB type sites that are pleasant to use but again for niches. I would go for Reddit if you use “old” I guess and pick good subs.