I've got a friend who was drinking 3 shots of coffee a day just to not melt from exhaustion, if not more. He decided to stop completely, sleept horibly for a week then he was great. Now one cup of coffee gets him really eletric.

I've been almost a year without drinking considerable quantities of alcohol and it feels pretty good. In fact now I dislike drinking. Recently I drank half a shot of vodka and almost threw up.

I'd think it's not about going to 0 coffee and staying like that, but about building a better relation to it. Like medicine. Take it when you need it, don't overdo it.