I used to drink a litre of brewed coffee a day, when I worked at home. I drank it from 9AM to 4PM. When I resumed office work, that fell to about 3 shots a day

I used to drink a litre of brewed coffee a day, when I worked at home. I drank it from 9AM to 4PM. When I resumed office work, that fell to about 3 shots a day (espresso equivalent), all by itself. No withdrawal. Now I'm retired. I drink one strong coffee in the morning, with occassionally a shot later, on te rare occassions when I pass my fave coffee shop. None of these changes required any effort, or even any intention; they just happened. There were never withdrawal symptoms. By comparison, I have withdrawn from both alcohol and nicotine; nicotine calls loudly, but alcohol withdrawal is really horrible (and dangerous).