I read HN because not just that happens, but also the comments will usually provide several other insights or links of equal value!

Perhaps this is an idea for a bookmarklet: for any Wikipedia article, click on the bookmarklet and get the HN comments related to it.

You might be able to use https://hn.algolia.com/ which searches every comment/submission from HN. Just paste in a wikipedia link to see if it has already been submitted, then click to the comment section.

Or any URL more generally. I'd use this.

There was something like this in the past, I think it even was nice enough to check URLs client-side to preserve privacy.

Is HN the only place that happens? Has anyone found another site that has a lots of well organized quality intellectually stimulating content?

There is slatestarcodex.com and a handful of twitter accounts. Also, there are some think tank slacks that are out there, but most of the good stuff is private. Occasionally the ArmsControlWonk slack will be hours ahead of the news and with a lot more certainty over something.

These are specialized sites - I'm wondering if there's an aggregate site like HN for well educated commenters.

We need a healthy ecosystem of sites like HN.

Metafilter

Definitely not the only place but yeah it's cool such links are getting some love here.

So true. Love the diversity.

I'm truly baffled by this. Was it an attempt to display marketing prowess?

indeed, this could be a good 'news' for hackers ;p