我果粉啦。
發表會中 Craig 有提到 A9 chip，當時我想大概這就是升級的底線了。
根據蘋果新聞稿
Availability
The developer preview of iOS 13 is available to Apple Developer Program members at developer.apple.com starting today, and a public beta program will be available to iOS users later this month at beta.apple.com. New software features will be available this fall as a free software update for iPhone 6s and later, and will be available with iPadOS for iPad Air 2 and later, all iPad Pro models, iPad 5th generation and later, and iPad mini 4 and later. iPadOS also introduces new capabilities and intuitive features that take advantage of the unique characteristics of iPad. For more information, visit apple.com/ios/ios-13-preview and apple.com/ipados/ipados-preview/. Features are subject to change. Some features may not be available in all regions or all languages.
所以可以上 iOS 13 的設備：
iPhon 6S 後續機種，iPhone 6 以下不支援了。
iPadOS：
iPad Air2 後續機種、所有 iPad Pro、iPad 5 代後續機種、iPad mini 4 後續機種。
跟我推測的一樣，今年是 6S/SE 的最後一年了。根據發表會，應該這些機器執行速度上還是不錯的。現在就等 beta 了。
從 APP 打開
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