Some blogs might be run on static blog engines like Jekyll. The only sane way of adding comments to these static blogs would be to use Disqus or some other 3rd

Some blogs might be run on static blog engines like Jekyll. The only sane way of adding comments to these static blogs would be to use Disqus or some other 3rd party commenting system. These 3rd party systems might include ads or be killed off sometime in the future (and then where do I port my comments to?). It does make sense when someone wants to let HN or the public space like Twitter handle the discussion. I don't have a commenting system on my blog for the same reason.