It never fails to amaze me how many HN contributors don't seem to read the linked articles yet seem compelled to tell you off for things you've already accounted for, explained and justified.
There's absolutely nothing in the article (which I did read) about it. If you yourself had read the article, you would know that it was not explained, accounted for, or justified.
There is a single vague reference to a "primary DC". There is no discussion at all of backups or disaster recovery.
It's because comments are usually far more intelligent and interesting to read and I set my app to open up comments than the story by default. I don't blame the others doing the same.
So how can you comment on, or have a critical thought about an article, if you're just reading a bunch of other comments likely left by others who also likely didn't read the article?
I find that genuinely baffling, and somewhat worrying, especially on more serious topics.