Coke owns most sodas, so if you're switching, you're likely to end up switching to another Coke product.

It's already been priced in: https://www.reddit.com/r/wallstreetbets/comments/eberem/ever... ;)

Why would it? If it's a carcinogen for Coke then it's a carcinogen for Pepsi or everyone else.

they'll just swap it out for the next artificial sweetener

and that'll be found to be bad in 20 years time, then they repeat again