> but we can certainly model them Our ability to model quantum systems is feeble indeed. Anything more than about 40 qubits and it starts costing millions of d

> but we can certainly model them Our ability to model quantum systems is feeble indeed. Anything more than about 40 qubits and it starts costing millions of dollars. 50 qubits just forget about it. There's plenty of quantum condensed matter physics that is just completely impossible to model. Even in chemistry, there are huge swathes of molecules that we fail to be able to model. This is hopefully going to be the "killer app" of quantum computers, btw.