Overall, I agree. I run my own yard offgrid with solar and battery, but I still end up firing up the generator a fair bit in winter because the demand periods don't match the production peak.

But it seems like that's just a scaling problem, and it seems like a few billion spent on batteries is a less technical solution than a fission plant, depending on the design and scale. But it hasn't really happened yet, even in China where the parts are produced. They're further along, but they're still firing up coal and nuclear at a scale unmatched by the western countries right now, alongside record solar production. So something in that theory isn't lining up.