The drawback is that the iOS 7 is preferably designed to newer version of iPhone and iPad such as iPhone 5 and iPad 4th generation that have much faster hardware compared with the older or earlier version of iPhone or iPad. Also, if you insist to stay on your current iOS 6, the application you downloaded using your current iOS will not be updated anymore since the developers will now be encouraged to concentrate on the latest version of iOS—leading old applications into oblivion. Remember,after downloading and installing iOS 7, you can not revert to the previous iOS 6.
The advantage of having the latest iOS is
that you can continuously update application you just downloaded using
the latest version of iOS 7. New full features are available only for iPhone 5
and iPad 4. However, limited features are expected for older version of
iPhone and iPad.For your own comfortability and convenience, wait until Apple Corporation releases new update of iOS 7 that would be available within weeks or a month after it was launched. Repairing bugs in the new iOS 7 are very much anticipated. While awaiting for updates, just relax and be patient to avoid hassle and frustration in the future.
Source From The Web:
http://edition.cnn.com/2013/09/18/tech/mobile/ios-7-upgrade-faq/?c=&page=5
