Is the superconducting qubit really the best path to a useful quantum computer?

[R948]

Superconducting qubits, the approach used by Google and IBM, currently get the most funding and headlines in the quantum computing race, but that doesn't necessarily mean it's the best long term architecture. They're relatively easy to fabricate using existing chip manufacturing techniques and have shown the fastest gate speeds of any current approach. But they also require extreme cooling, close to absolute zero, and tend to have shorter coherence times than some competing approaches. Curious what people think actually wins this race long term rather than just leads it right now

Trapped ion systems, used by companies like IonQ, offer longer coherence times and higher fidelity gates, but operate much slower and face serious scaling challenges as you add more ions. Neutral atom approaches from companies like QuEra and Pasqal are newer entrants that some researchers think could scale more easily. Feels like a genuinely open question rather than a settled one at this point

What's your pick for the architecture that actually gets us to useful, fault tolerant quantum computing first. Curious how people are weighing speed versus stability versus scalability here