Facebook was hitting 4 petabytes a day of user data back in 2014. Back then, there were only a handful of giants needing that. Today, multiple systems are now being scaled to handle that sort of data volume. Think automotive fleet systems and other IIoT applications. Mobile networks (and security systems for them) managing tens of millions of devices.

https://research.fb.com/facebook-s-top-open-data-problems/