Maybe carriers will finally start taking identity verification seriously. When everyone's name, address and SSN (or equivalent) is leaked, somebody might finally get the idea that they're rubbish secrets.
My name and address is actually public as a self-employed Czech. My date of birth shouldn't be hard to find and plenty of people even publish it (why shouldn't they?), my mother's maiden name might be somewhere too, and I don't even have her as a friend on any social media platform.
I really think it's time to start accepting no less than a unique password, hardware identification key or a physical visit to a location with a forgery-resistant ID card.
Have any companies had significant fines levied? Certainly nothing large enough to change behavior.
The OPM leak remains the most significant overall of which I'm aware. The Experian leak tops my commercial data leak list, although they get bonus points for then selling people their own data protection service(s).
But also unfortunately, let the SIM hacking games begin.