You're absolutely right that not everyone seeing this comment tree knows the details of Electron's memory usage. But I don't think that GGP's original comment was aimed to educate those people about the issue. To me it just sounded like a quip aimed at getting some cheap points from the choir.
Yeah I could see how if you are used to seeing such posts it would come as more of a slight but from my perspective it's good to know people's gripes about a product having not followed much about this before - especially if some people might be trying it out as a result of the article. The ambiguity of purpose is the bane of internet comments.