https://bryanalexander.org/personal/a-year-without-caffeine/
I am coming up on a year without caffeine like this guy. I was never addicted like he was, nor did I face severe health problems from it. I just noticed that the quality of my decision making went way down on caffeine. I was not able to prioritize things properly. I would feel strangely tired or lazy sometimes or way too energized. Now without caffeine, every day I feel stable, productive, and happy.