Apple has included a new feature in iOS 9 beta 2 that will temporarily delete apps from devices to make space for system updates.
Introduced in iOS 17.1 and watchOS 10.1, NameDrop is a novel feature that facilitates the sharing of contact information between nearby iPhones and Apple Watches by holding them together.
WhatsApp introduces a breakthrough feature enabling iPhone users to share photos and videos in their original quality on the messaging platform.
According to a recent report, the iPhone 16 series might come with an additional hardware button.
So basically they're telling people advance to make room for iOS9 by deleting unused apps, seems okay to me.