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Quantum computing will never be the future of computing. If we manage to make it work, it will at best be something like a TPU: a specialized processor for accelerating specific tasks. It will always be faster and easier to build more powerful classical computers than an equivalently fast quantum machine.

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Eli5

Quantum computing only solves a few specific problems. Like showing every possible outcome. For instance print(x), and your goal is to get a through z.

But if the problem is linear, like 2+2, it doesn't help to have quantum computing.

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