I’m curious if not drinking coffee is associated with getting a caffeine fix from less healthy sources (sodas, energy drinks) and if that is a potentially confounding factor.
Going to work and being a part of a large organization that works on cool products definitely “energizes” me. I have friends at work that I enjoy seeing daily. I would have a hard time keeping my job without caffeine. I could easily see all the ancillary life benefits of being caffeine addicted being the primary reason why coffee seems to be good for health in all these studies.