The cost of batteries is immaterial to anything being discussed here.
As you already knew.
As you already knew.
> Batteries will probably be cheaper,
The above commenter clearly thinks that batteries are going to provide cheap storage.
If you have some alternative plan for storage at the scale of tens of terawatt hours, please do tell.
It's great for countries that have it, but you're not going to be storing much hydroelectricity outside of mountainous regions.