This may be a situation where HackerNews' shorthand of omitting the subdomain is not good. spectrum.ieee.org appears to be more of a newsletter or editorial part of the website, but you wouldn't know that's what this was just based on the HN tag.

I've been on this site for over a decade now and didn't know this. That's a genuinely baffling decision given how different content across subdomains can be.

Maybe an exception could be made here, like HN does for medium.com.

On the other hand, “ieee spectrum” is directly at the top of the page, then “guest article.”