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We use chips of silicon in computers and mobile phones and many other devices because we can control the conductivity of silicon.

We cannot control the conductivity of metal conductors -- they are always highly conductive.

The really magical thing about silicon is that it can be doped such that a few regions (the "transistor channels") can be actively switched from conductive to insulating, millions of times per second.

I wouldn't say I prefer one over the other, though -- all those devices invariably *also* have many metal conductors.

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12y ago

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