Well, I haven't known of any major data breach that wasn't deliberate, and as the article you referenced notes:
Additionally, Hunt suggested that “multiple parties” might be involved in the recent disruptions, noting that “when we’re talking breach + defacement + DDoS, it’s clearly not just one attack.”
It's not on a scale more significant than a number of data breaches in recent years have been. Think the Anthem and Equifax (among
others). They're just a part of life now, and end users have to be prepared to have this happen to them and take appropriate action when it does.
I was part of the Anthem and Equifax data breaches, and I think one more. I know I've received free identity theft monitoring on at least two occasions, one of which is still active.