> And due to the quick quitting, the benefits were much more noticeable. Within a couple of weeks it was immediately obvious to me how much more alert I was throughout the day, how much of my normal workday sluggishness and brain fog was artificially caused by caffeine, and how much less greasy my skin was

Interestingly, I also quit fairly quickly, about two years ago. Honestly though, I did not experience such major, obvious benefits. I was definitely overdoing coffee in the past, and when it got to the point that I needed two strong ones before 9AM to get going, I decided it's time to stop taking loans out against my sleep.

But basically post-quit, I have similar levels of energy/tiredness, overall (compared to a normal, on-coffee day). It's just less peaky and trough-y, and sleep is more predictable. The main difference I would say is that on that rare occasion when I now have a coffee, it has an extremely sharp effect. It's pretty odd, and I'm wondering if people are overblowing the effects, or if I'm just the odd one out.