https://arstechnica.com/gadgets/2018/09/ios-12-thoroughly-reviewed/

Apple's iOS 12 software update is available today for supported iPhone, iPad, and iPod touch devices, and on the surface, it looks like one of the smallest new iOS releases Apple has pushed out.

This isn't a surprise; Apple said earlier this year that iOS 12 would be more about performance and stability than adding new features. Some major additions that were originally planned—like an overhauled home screen—were reportedly delayed to a later release.