If leaf was available to me, I'd never touch caffeine. I don't react well to caffeine, but find low dose nicotine or cocaine to be insultingly effective. I can't really handle doing coke recreationally, it's just too much on my body. But it was the stim that hit me the way stims are supposed to hit people with ADHD. So the few times I've gotten actual leaf, it's been an amazing few days of functional medication.

Coca isn't addictive until it's extracted out of the plant. One line of coke is probably like taking 10+ leafs at the exact same time in a way that's far faster than chewing.