Counter-point: I've lived without coffee/caffeine in the past, but I've never felt better and more productive than now, when I drink 1-2 coffees in the morning

Counter-point: I've lived without coffee/caffeine in the past, but I've never felt better and more productive than now, when I drink 1-2 coffees in the morning & stricly avoid any more caffeine than that. It helps to set up a working rhythm for me.