When a vulnerability like this becomes public, I always wonder - how many people knew about it before it became public, for how long and how much has it been ex

When a vulnerability like this becomes public, I always wonder - how many people knew about it before it became public, for how long and how much has it been exploited. And I also wonder how many more critical exploits are known and used by 'hackers' or agencies today while we have this puffy feeling that our data/communication is private and secure ? The conclusion I can draw from this: never trust that your phone is secure. Or computer for that matter.