Quantum computing is the latest tech darling to grab headlines, and with it comes a flood of bold claims about how it will revolutionise everything from cryptography to drug discovery to AI. You’d be forgiven for thinking that we’re just a few years away from a quantum-powered utopia where today’s problems vanish into a haze of quantum bits (qubits) and entanglement. But as with so many tech fads, much of what’s being said about quantum computing is exaggerated—or, to put it bluntly, bollocks.