Swift should theoretically deliver faster apps with less message passing overall and other big improvements. At the end of the day the latest phones need to ke

Swift should theoretically deliver faster apps with less message passing overall and other big improvements. At the end of the day the latest phones need to keep up with competitors and added features and resimplified experiences that are more costly to implement cannot be avoided. The only way to really avoid it is disallowing older phones to upgrade - which is far less desirable IMO.