I'll also skip the X for a year. Apple often had it's problems with completely new versions and technologies. FaceID is a new tech, and will probably improve fast (speed, reliability, better viewing angle etc.). OLED is also new for Apple, and we will see how it's working for them. I often heard about issues with OLED displays. So we will see. Also the new user interface because of the missing homebutton has to prove to be intuitive on a day to day basis. On top of that, I also think that the availability of the X will be limited for some month. That's why I go with the 8+ for now, what is probably the most matured iPhone Apple has ever built.