One of the biggest advantages is the fact that the iPhones introduced years ago still receive updates. Of course, iOS 13 will not receive the update, such as iPhone models offered at Apple at some point in this support.
In fact, it is not the first time in iOS 13 that support is terminated. Because iOS 12 is limited to some models, others can take full advantage.
Some reports that appeared before WWDC 2019 indicated that the models introduced prior to the iPhone SE were devices that would not receive iOS 13. This was confirmed by Apple's official release of iOS 13.
iPhone 5, iPhone SE, iPhone 6 and iPhone 6 Plus will not be updated to iOS 13. The oldest devices that will receive the update will be the iPhone 6s and iPhone 6S Plus.
Introducing the iPhone 11 series, Apple announced that iOS 13 will release on September 19 . iPadOS will be available on September 30th. iPhone users will not wait much longer for a new update after iOS 13.
The iOS 13.1 version, which is currently being tested, will be released on September 30 in case of any failure.