Should I update my iPhone/iPad?

In this video I cover the Pros and Cons of updating your devices. You definitely should be updating but sometimes there can be some issues with updating that you may not have been aware of, so that is what I try to make clear so you'll know when you should and when you shouldn't.
Articles used:
support.apple.com/en-us/HT204204 - Update your iPhone, iPad...
support.apple.com/guide/iphon... - Update iOS on iPhone
support.apple.com/en-us/HT212186 - Update your iPhone, iPad, or iPod touch with iTunes