I used to drink what was probably an unhealthy amount of caffeine on a daily basis. Not out of any discernible addiction, more as a thing to do that mildly impr

I used to drink what was probably an unhealthy amount of caffeine on a daily basis. Not out of any discernible addiction, more as a thing to do that mildly improved my focus and tasted good. I got cut off for the day by the coffee bar at work one time after having an iced latte with 10 shots of espresso, which itself was after a few other drinks IIRC. It's probably been a decade or so at this point since I've consumed caffeine with any regularity, but on the odd occasion that I do have a cup or two of coffee, I wouldn't say the effect is particularly remarkable. I guess it just affects everyone differently.