How worried should you be about the security flaw in Apple's new macOS?
https://www.washingtonpost.com/news/the-switch/wp/2017/09/26/how-worried-you-should-be-about-the-security-flaw-in-apples-new-macos/
A security flaw in High Sierra may make you hold off on updating, especially if you download software that isn't from the App Store.