on the contrary this makes me bullish about their team, it shows that people here care about the craft

The team is good, and I enjoyed the read. But this is just an engineering blog post. They're promoting this like it's ground breaking research and it's on their front-page. Ultimately this paper is not very meaningful and just a fun debugging session.

I've seen this play out dozens of times. So many startups that have come and go in the bay area were composed of extremely talented individuals, but almost all of them failed.