You've misunderstood the point of the article and only seem to be reinforcing that in these messages. The point is not being conservative on the whole, but conservative within the already established technology choices in the company.
Yeah, but you see, that doesn't work. You can't start hipster and switch to conservative. Because you have a number of specialist tools that are hard to reapply. As I said, you can see the cracks in the article. The use of diatomic is caveated.
I feel like someone has had a realization that they need to stop using tailored technologies. This article is them trying to put the breaks on the engineering culture of over-engineering. Or maybe diatomics success means everyone who works there is trying to write a new DB or something.