The link to the What's New in iOS 11 page is wrong, it's here: https://developer.apple.com/library/content/releasenotes/General/WhatsNewIniOS/Articles/iOS_11_0.

The link to the What's New in iOS 11 page is wrong, it's here: https://developer.apple.com/library/content/releasenotes/General/WhatsNewIniOS/Articles/iOS_11_0.html https://developer.apple.com/library/content/releasenotes/Gen... APFS is mentioned at the very end.