If you've been missing your phone notifications recently, you're not going crazy. You probably just can't hear them thanks to the Apple's latest update.
Apple finally admitted that yes, software updates slow the performance of our older iPhones. While many lost their minds over this admission, I admit, I yawned. I just don't care that much if my iPhone is a little slower.
CNN reports that older iPhones may have battery issues that could shut the phone down in the middle of something to protect its components...