Software Quality is actually a science that, if practiced; prevents this sort of calamity.
Imagine the cost savings of actually regressive testing an update before deployment
“Imagine the cost savings of actually regressive testing an update before deployment”
These communications companies like AT&T do that and created those kinds of M&P’s long ago.
It’s hard to say what happened here as we don’t have the details. Perhaps an update that survived testing only to create havoc once it went live? Not sure.