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True, but the runnable code on that page is several levels of abstraction removed from the actual Game of life states.

The page you linked runs the code in a Javascript implementation of their CPU. That's a significant shortcut. The CPU was otherwise implemented with logic gates that were implemented with varlife circuits that were implemented with metapixels in Game of Life. None of this is present in the browser implementation.

As logicallee's comment below says, the actual Game of life board behind the implementation is absolutely massive with tens of gigabytes needed to represent the state of the Tetris computer.

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