Are you replying to the right comment? Or maybe just haven't had your morning coffee yet? ;)

The point I'm making is that a non-coffee drinker won't have "withdrawal symptoms", so OP's suggestion that the beneficial effects they observed were just "cessation of withdrawal symptoms" doesn't make any sense. As in literally nonsense: "a non-coffee drinker's withdrawal symptoms" is nonsensical in the same way the idea of a square circle is.