I've supported Windows for years and am just starting to support some Mac devices. If an iPhone or iPad is running an older version of an iOS and is compatible with the new version, is it best to:
Download and install the newer iOS as soon as becomes available?
Wait a couple of months to let Apple work the kinks out and then download the new iOS?
Is it sometimes advisable to not download the new iOS? Are there circumstances where it's advantageous to leave the iOS as is on an iPhone or iPad?