Bad Qubits — Learn Quantum by Doing

Multiple choice

How does the lesson characterize the current 'NISQ era' of quantum hardware?

Devices of tens to hundreds of noisy qubits — too small to error-correct a useful computation, but large enough to probe variational algorithms, error mitigation, and sampling experiments
A purely theoretical era with no physical quantum hardware yet built
Fully fault-tolerant machines of millions of logical qubits that run any algorithm below threshold
Single-qubit devices used only for transmitting classical bits