I explained this earlier. It all depends on how tough your follicles are naturally. If you are predisposed to balding then your follicles and flabby and sick by nature so damaging them with electric razors over and over again will eventually kill them and some wont grow back again. This doesnt mean that if you have the balding gene you wont go bald if you dont get line ups....what it means is that those frequent lineups will ACCELERATE the onset of the balding process. Instead of balding in your late 30s or early 40s, them lineups will trigger the balding much sooner (in your 20s usually)..
Been getting lineups since my first hair cut at 1 (too young to be getting lineups), still have my hairline:diesel: