Slack export fails, Slack team says the only way to not have data enter ‘deletion queue’ is to sign new contract
The idea of HN threads is good, curious conversation, and that requires avoiding formulaic responses, even if they're well-intentioned.
Yes, HN has the option of submitting a comment with and when you create a post, but that the use of that should be to provide your own commentary or context, not merely to re-hash the post itself.
And yes, the additional text you provide with a text link does appear as a comment, that's intentional, see e.g.,:
<https://news.ycombinator.com/item?id=29543426>
<https://news.ycombinator.com/item?id=7897019>
<https://news.ycombinator.com/item?id=18652492>
(Not HN staff or a mod, just a long-term member.)