I have absolutely no desire for a XS since I find it very similar to a X for my uses (mostly Safari, music, and movies, casual camera and gaming). If the next iPhone retains the same design (similar to iPhone 6, 6S, 7, 8), will you stick it out with the X for one more year? I can go as far as to say if it retains the same design 4 years in a row (like iPhone 6 through 8), I will go as far as keeping my X for a 4th year.