I have an iPhone 5 and I'm worried because Apple may be going to drop it with iOS 11. The iPhone 5 is not so gorgeous anymore and it's slow, but it works fine so far and if I can continue using it safely next year I'll be happy to do so. I think the biggest problem with using an older phone is the security risk. Obviously Apple doesn't give fixes to older phones when they say they don't support it on the latest iOS, though I see many people still use their iPhone 4s. How risky is it? What's your opinion on using an old iPhone with an old iOS?