I tend to think, at least here on HN, the comments tend to provide more context to the linked article/question. The audience here is more technically knowledga

I tend to think, at least here on HN, the comments tend to provide more context to the linked article/question. The audience here is more technically knowledgable on subjects and the conversation can certainly offer much more than the original link. Of course, the community is nice here overall. In other areas, leaving comments tends to not be productive because of the trolls and overall negative commentary, things which aren't accepted here.