Apple emergency updates fix 3 new zero-days exploited in attacks
bleepingcomputer.com
bleepingcomputer.com
And it's not like these were found due to increased testing and code reviews. Many were observed in the wild by 3rd parties.
I've noticed that these zero days almost always affect macOS and watchOS too. You can see that new versions of both have also dropped today: https://support.apple.com/en-us/HT201222
So as a consumer, I am having to update my phone, tablet and laptop frequently now to guard against attacks that were actively exploited in the wild.
I will be really curious to see what Apple does about this. They've already introduced a "Lockdown" mode and rapid security response updates but I would not be surprised if this galvanizes an even bigger shift.
But there is not much information available, probably due to researchers having their hands full. Or maybe its a private agreement with Apple