They are actually of the same age, the iPhone 8 and X came out at the same time (yes it’s still confusing now)

> I doubt iOS 17 will be adopted faster than previous versions. For one, they are dropping support for multiple device generations this time.

Each release gets adopted faster than the previous version; there’s no reason to expect anything different this year.

Also, just about every new iOS release drops support for older iPhones; this isn’t new.

No longer requiring developer accounts to install the iOS 17 beta will only increase the rate of adoption—many millions of users who aren’t developers will be running it before the official release in September, unlike years past.