This is also a loss for apple however, as many of their ideas started as rudimentary tweaks/ add-ons. Categories was there before grouping apps was encoded into the kernel, notifications came from LockInfo, Notified, MobileNotifier, and IntelliScreen. Camera snapping from volume buttons could be found from FastSnap, SnapTap, and CameraButtons, Snappy allowed you to see your albums from the lockscreen before iOS5, wi-fi sync was inspired by a cydia tweak by the same name, the list goes on and on. My point is, this decline in interest from the jailbreak community is not necessarily a complete win for Apple, as imagine what iOS 5 would be like without a number of the tweaks mentioned above. Some of the best parts of iOS comes from Jailbreaking. This is a loss for many involved.