I've gone through caffeine withdrawal a few times. 3 or 4 days of walking around with an axe in my head, or so it feels. I'm at 2 cups a day now and content to be there. It can be done, just don't expect to function during the withdrawal. But the suffering is temporary and with strength you can pass through it. Pain is weakness leaving the body, as the saying goes. On the other hand, good coffee is one of lifes better pleasures at little cost, and not a bad source of antioxidants too. Also it may help fend off Alzheimer's in older adults. So now I set myself a limit and stick too it.