Yes absolutely. I didn't mean to imply that this was in any way universal. Coffee may be the second hardest thing for me. I've successfully given it up for a month or more a number of times, getting all the way through withdrawal symptoms where I generally feel happier and more energetic. So far I've always restarted consumption. Not out of a physical/psychological want but because it's so easy, mildly pleasant, and aids focus during work hours.