It seems to me that coffee is more or less a waste of time and money. Any given study that might show any benefit of caffeine is offset by another study which shows a detriment, or simply no effect (other than the stimulent and short-term physical addiction).
This year (2025) I will turn back the clock to a time I had stopped drinking coffee (for a few years). I got in the habit the way any widely available and casually addictive substance is come by, that is at first nonchalantly, but then quite soon building up into a daily (sometimes twice daily) habit. Even at the fairly low prices of 25 Thai baht (about $1 USD) for a mocha, hot, slightly sweet, that adds up quickly over the course of a year. Usually I would read my ebook or some news or social media when imbibing, but there still is time taken to get to the dispensary, and consume, and the cost.
At 35 THB that is 12,775 THB over the course of a year, at the prices found at Miracle Coffee. If I went to Starbucks, just a 1 minute walk from Miracle it would be 135 THB / mocha, and 49,275 THB for the year. Both are ridiculously large sums of money in the local currency.
In any case, I'll get time and money back (though not actually back, rather it won't have left for that purpose).
Breaking a Coffee Habit
I've stopped drinking coffee several times, and sometimes it seems more difficult than others. What I've found useful is to skip a day, then drink coffee the second day, then stop altogether. It is usually the third day that seems the hardest, and addiction can ramp back up after two days in a row. This works for me, but I have no actual evidence beyond anecdotal. I've gifted my wife my well-loved Muji stainless beverage container, so that will continue performing for the family.