I actually kind of need coffee. I have mild asthma, and a heart valve defect. Which I did not know until my mid-40s, because I have been drinking coffee since I was 13. It turns out that caffeine is chemically related to theophylline, which is an asthma drug. So I'd been treating my asthma without knowing it, all my life. And the slight rise in BP compensated for the heart valve issue (my BP is ridiculous: 95/70).
At least, this is what my cardiologist and pulmonologist told me, WRT why I never had any idea about either of these things.
If I don't drink coffee fairly regularly, my risk of pneumonia goes way up - apparently related to the asthma. With a bad heart valve, that's even more dangerous than normal.
So coffee for me, caffeinated please, as long as my body can handle it.
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"I believe you find life such a problem because you think there are the good people and the bad people," said the man. "You're wrong, of course. There are, always and only, the bad people, but some of them are on opposite sides."
-- Terry Pratchett, Guards! Guards!