Both GCP/AWS already probably have (or had, if they were alerted before public disclosure) security teams probing their internal systems to see if they're vulne

Both GCP/AWS already probably have (or had, if they were alerted before public disclosure) security teams probing their internal systems to see if they're vulnerable, and install firmware patches. The danger is more medium-to-large organizations whose internal clouds and desktop systems are impossible to patch at scale.