I don't know what to think of this, that seems a weird implementation, is that a genuine iPhone ?
I would have thought that the cooldown would prevent entering a new passcode for an increasing period of time. There should have been several more reasonable cooldown period but way beyond the patience of the most tenacious toddler (eg: 1 day) before hitting 47 years.
What's going on then ? The iPhone allows you to try as many times as you want, but upon success, it tells you "Sorry bro, you have tried 1000th time before so you'll have to wait 80 years" What's the point ? Why no just prevent even attempting it ?