Longevity of distraction, as distraction itself, is absolutely subjective. Nothing more so. Someone's method and timing for activating a function on a screen may well be very different from mine. Something that I find to have no distractive qualities at all may bug someone else for ages. For me, there is nothing I need to do on the screen that takes significantly longer or is overall more distracting than previously. Some functions are a fraction of a second longer to activate, others that much quicker. It's about adapting and learning. There is certainly nothing so much more distracting as to be considered dangerous. That argument is simply not valid and is without an iota of proof. It's simply a subjective feeling/belief. That supposed study referenced is also not applicable, meaning the description is of a very different type of scenerio, and readjustment in this case should be a one-time thing. If not there is a larger problem.