Apple demoed their iOS11 at WWDC in 2017 June 5, it has great changes compared with previous version and add many new functions. There are rumors that it will come with iPhone 8. Should we upgrade iOS11 as soon as it's officially pushed? As we all know, to give users a better experience, smart-phone manufacturers update their systems from time to time. Generally, Apple or Android mobile phone manufacturers push users a new system to get a better experience in fluency, stability and so on. But there are two opinions about whether update the system and when to do it. Some users will update system the first time while others hate to do it. Why we have different views in one thing? Here we talk about the advantages and disadvantages of system update. Advantage Improve system stability. For users, a stable system without bug can give them better experience. Most new systems will fix the bug in the previous version to improve the stability and security. Improve system fluenc...