Good job this story has “Quantum Computing” in scare quotes because it’s nothing to do with quantum computing – computing using quantum information in qubits. It’s a computer that uses quantum effects, like every computer – in fact like every device, and indeed everything in the cosmos, you and me included. What it is using specifically is the quantum tunnelling “Josephson Effect” apparently.
The debate about quantum computing is not so much about whether it’s a practical way to build a computer, which would be nice if it were possible, it’s about computation as the foundation of reality. (Nobel prize-winning Josephson is one of my sources on world models in physics.)