For sure, it's "dose dependent". I was just correcting the assumption.

For a very small 45kg human that comes out to 30 cans of coke zero per day.

Not to split hairs, but the WHO says that the limit is between 9 to 14 cans for a 150lb person, which is still a lot, but not unreasonably so.

Considering that some countries have yearly soda consumption over 200L per person, coupled with the fact that someone who might be drinking diet cola, may also be using sugar-free foods (i.e. aspartame containing foods) throughout the day, then it seems possible that some may exceed the limit.

And that doesn't factor in different metabolic rates, other foods or medications that might enhance the effect, etc.

Disappointingly, stevia has a much lower "recommended limit", despite being shown to be safe. I wonder if that's because stevia comes from a plant, and not out of a lab, so it's harder to patent and monopolize in the market. 🤔