This is good to know. I don't care at all about using the latest iOS; if my iPhone 6S was still running the original version it shipped with, I'd never know the difference.
But I do care about security updates.
But I do care about security updates.
I would say that's the one place where Android got it right, you can keep having updated system apps for a long time after the OS itself is abandoned (which is shamefuly quickly).