When that happens, it will severely shorten the lifespan of the iOS 8.3 jailbreak, which would mean a huge waste of time for jailbreak developers.
So rather than releasing an iOS 8.3 jailbreak, the jailbreaking team will release instead an iOS 8.4 jailbreak since there will be no more update after it because iOS 9 will already be officially coming out in September.
That means that the iOS 8.4 and its subsequent iOS 8.4 jailbreak would have a lifespan covering the entire summer.
Apple is now giving users more reasons not to jailbreak their iOS devices, since its newest mobile operating system, the iOS 9, already includes new features that were taken from jailbreak tweaks.
Some of the cool new features of the iOS 9 have actually been around for a while in the form of jailbreak tweaks including proactivity, picture-in-picture video, low-power mode, among others, which jailbroken iOS 8 devices are already showcasing.