That blog post is from a year ago. And since Cockroach DB 1.0 was only released in May this year, it's a bit misleading to link to that post as though it was the current state of the sofware.
That blog post is referenced in their FAQ today, under the topic of what it can't do right now. Sorry if I misunderstood the situation, I’d appreciate any updated links.
See: https://www.cockroachlabs.com/docs/stable/frequently-asked-q...