It’s linked to increased blood pressure, increased risk of heart disease, kidney problems, etc, but as you mention there’s not anything rock solid and there’s also relatively recent studies that show positive effects.
For people that intake less than 400mg a day.
That’s the tricky bit. Do you know how many mgs of caffeine you take in on a daily basis?
Nah, they’ve always been selling it as map data. And I still 100% believe the NSA is involved