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Negative electricity prices registered in nearly all European energy markets
(www.pv-magazine.com)
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this post was submitted on 14 Apr 2024
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I'm afraid that's not how it works. You'll have enormous amounts of really salty water that you need to get rid of. Usually you'll just put back from where you took it thereby increasing salinity which is not good™ for ecosystems.https://www.wired.com/story/desalination-is-booming-but-what-about-all-that-toxic-brine/
The article you mentioned specifically mentions inland evaporative pool to turn those brine for road salts or other uses. But the problem is just that no one is doing it.
Probably because it's expensive and needs a lot of land. My point is still valid. The brine is a problem. Just like trash being a problem if not recycled properly (because it's more effort than just dumping or burning it).
That being said, I love the idea of having quasi infinite sweet water supplies but unfortunately it's not that simple.