Really? HN comments are full of tangents that only partly relate to an original post's topic, and it makes them all the more interesting in general. The comment

Really? HN comments are full of tangents that only partly relate to an original post's topic, and it makes them all the more interesting in general. The comment above is talking about COVID vaccines with interesting links and a decent argument, in a post about long covid and its effects. There's plenty of conversation-worthy correlation between the two.