There are real diminishing returns in terms of follow-up traffic and follow-up effects. As to be expected, but it's worth keeping in mind that this is something that generally happens over time as the novelty of whatever you're writing about wears off. The good part is that as part of this you'll gradually get more regular readers, so there's less pronounced feast-or-famine cycles.
(Here I don't measure visits as there's so much bot traffic noise especially on anything that hits HN, but mostly focus on whether I get actual engagement, if people reach out to me, send me emails and so on)
I think ultimately a blog post isn't interesting because it's on HN, it's on HN because it's interesting.
Tryharding with regards to the HN frontpage is more likely to come at a cost of writing quality, and thus reducing the likelihood of making the front page.