I've really gotten into upscale herbal teas and mocktails.

I was recently at a very small but upscale restaurant and they had a no-alcohol dinner flight pairing that was fantastic.

There is so much variety and no downsides!

Sugar (in large amounts) isn't so great for you either ...

And caffeine from coffee/tea while fine in moderation, becomes really bad if abused as part of a pattern of chronic sleep deprivation which is really common.

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.