True. Then again, they died at 30. OK, maybe not exactly. But close.

We're all at once less and more healthy than our ancestors.

But doesn't the small amount of sugar also work as an electrolyte? A
doctor said to me when I said salt in my water in the summer works for
me, that it can be dangerous to only add salt, as it is a balance
between salt, potassium, AND sugar.

And to the person who replied water is just fine because humans have
done well on that for ages:

An entire platoon of Danish troops in Iraq almost died because they only
had pure water and their rations didn't contain enough electrolytes so
they got dehydrated. Then they bought american rations (which I think
contains powder gatorade or similar), and they were fine.
Even I get dizzy in the afternoon if I dont add electrolytes to my water
in the summer.