well this is second hand from him, so that also makes it about 12 years old, but I figured it seemed like the kind of thing they would keep if not get stricter about.
The problem of course is that they want to make sure you don't take too much caffeine and have a problem, so they want to limit the strength of what you can get and my understanding from him was the strength was limited so that it was hard to get anything into you with the strength of a cup of espresso, as ridiculous as that sounds but nanny-statism is a thing.
I don’t know what I would even do with liquid caffeine. But again, I don’t want caffeine badly enough to be looking for alternative ways to get it.