There is neither sugar nor caffeine in herbal tea - you cannot drink too much of it

I have probably had a sum total of 10 mocktails in my life - each of which has less caffeine and sugar than a half can of coca-cola

Great - have at it! I like mocktails too!

I was just being a pedantic jerk reacting to: "no downsides."

There are often possible downsides to anything one can do ... but that doesn't mean it isn't something worth doing. I love to hike - I could break my ankle or fall of cliff - but that doesn't mean I should never hike.