I found it easy to quit caffeine.
My max intake was when drinking energy druid potions, I was doing 1 liter a day of monsters and redbulls. But I reduced it to zero and I was able to adapt.
Then I had a period drinkin coffee because is inexpensive compared to these redbulls. And when I stopped, again, nothing troublesome, I can derive energy boosts in other ways.
Conspiracy theories influenced me, lots of people say caffeine is bad for health, and they recommend cocaine instead or marijuana. But I am not very bothered. I want to test if my artistic abilities improve while im not using caffeine, I have the suspect it may be the case.