More qubits always means better performance

Qubit count is one metric among many. A system with 1000 noisy qubits with poor connectivity and high error rates is far less useful than 50 high-quality qubits with low noise and full connectivity. What matters is the number of fault-tolerant logical qubits, circuit depth achievable before decoherence, two-qubit gate fidelity, qubit connectivity, and coherence time. IBM quantum volume and CLOPS metrics were developed precisely because raw qubit count is misleading.

This concept requires either mathematical proof or hardware-scale experiments beyond what a browser simulator can demonstrate. See the research notes for the canonical references.