now. its not like apps will be updated then, or a week after, or a month after. its when devs want to if ever, theres a plethora of apps that take nearly a year to get last year's update from lazy devs, so dont let that be the reason. many work as is, & apple is already allowing updated apps for ios 11 through, my email app was already updated specifically for ios 11 says so right in the version notes (it worked prior anyway)