What are you criticizing here? You're ultimately criticizing the HN community for upvoting a topic you're not interested in, which IMO is absurd, you're telling

What are you criticizing here? You're ultimately criticizing the HN community for upvoting a topic you're not interested in, which IMO is absurd, you're telling people what to be interested in. Either that, or you're criticizing the blog post author for not covering all audiences, which is also absur, folks are allowed to target audiences. This isn't really constructive. Like Steve said, this post wasn't written for a general audience. A Rustacean will read that post and will be very happy to know that they can do certain things using pure Rust libraries. That was the audience of the post, the post makes total sense in that context, and has inherent value in that context. It got shared more widely, and HN seems to like it, which means that possibly folks who weren't the original intended audience are reading it, which is okay too, just that they may not find it that interesting.