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Blackout happened because Texas grid made assumptions about max demand that came out to be too low, plus supply was reduced by power plant failures.
For a closed system, that was game over. This is due to the law of conservation of energy.
But since the law is valid for an *isolated system* the only way to game it is to expand the boundary of the system. This is precisely why all countries in the world are now expanding their grids.
Except for Texas, that is.