One concern the post brings up - single point of failure. Yes, in this case, blah blah big company microsoft blah blah (I don't disagree, but..). I'm more worried about places like Paypal/Google/etc banning than the beast from Redmond.
Self hosting, it's still a single point of failure and the article arguing "mirroring", well... it allows redundancy with reads but writes?
It's an interesting take on a purist problem.