Hardening the Kernel in Android Oreo (Android Developers Blog)

> I understand 'in the industry' as 'in the phone OS industry', and 'update' as 'OS version
> upgrade pushed to users'. Which probably means apple doesn't do that either for
> iphones. And probably also Microsoft for windows phone.

For what regards iPhones, a rapid check on Wikipedia gives:

"The iOS kernel is the XNU kernel of Darwin. The original iPhone OS (1.0) up to iPhone OS 3.1.3 used Darwin 9.0.0d1. iOS 4 was based on Darwin 10. iOS 5 was based on Darwin 11. iOS 6 was based on Darwin 13. iOS 7 and iOS 8 are based on Darwin 14. iOS 9 is based on Darwin 15. iOS 10 is based on Darwin 16."

... but honestly, I don't want to bring it into an "Android vs. iOS discussion". What matters is that they ('probably') are marketing results on the Linux kernel without ('maybe') providing the full, contextual, information.