If it were just a Juniper implementation flaw it’d be less interesting than explaining an aspect of BGP error handling more generally which is indeed what the article was, for those of us aware of BGP but not familiar with specific protocol design decisions and implications.
If you quibbled with the word “Grave” I might agree since it’s not industrywide and impacting major vendors like Cisco and Huawei and those implementing RFC 7606 (although there is no patch for Nokia or Extreme or Bird!) I’d counterpropose that a more neutral TLDR title/summary for an HN audience might be “Grave flaws in non compliant BGP error handling.”
But on balance I think the author is better off with raising the alarm with a stronger headline; he clearly put his passion to good use and I learned a little something as a result.
Absolutely not. To me, it's a miracle that the internet even works.