Such a bug didn't deserve the snarkiness it got; as the article author notes, Linux itself remains a minor platform for end users, and benefits from people doing ports to Linux of software that has more users on other platforms. (For instance, Firefox and Chrome both have far more users on Windows than Linux.) But apart from the unnecessarily snarky response, I think this played out exactly as it should have. A kinder response would have been "none of us run OpenBSD, but if you can provide a non-invasive patch, we'll merge it". Which ended up happening anyway.
More importantly, why doesn't OpenBSD have procfs? Is there something fundamentally wrong with the idea? Is there some more standard alternative that portable software should be using?
It wasn't long ago that Linux users fancied themselves the underdog being sidelined in favor of Windows. Now, the Linux users have become the Goliath flaunting their weight and key spokespeople even encouraging the rejection of all other platforms. It is a community defined by myopia, arrogance and a refusal to look outside its borders.