The Globe and Mail reports in its Saturday edition that earlier this year, Nvidia boss Jensen Huang said he did not expect quantum computers to become "very useful" for 15 to 20 years, sparking a sell-off in quantum stocks -- though he backtracked last month. The Globe's Sean Silcoff and Ivan Semeniuk write that Quantum Benchmarking Initiative manager Dr. Joe Altepeter says that among the 10 smartest physicists he knows, "half are convinced [quantum computing] will be the most important technology of the 21st century and will revolutionize everything we do. The other five are convinced you'll never build a quantum computer no matter what you do" -- or that if one is built, "it would never be more useful than your laptop for solving a real problem." Federal Quantum Advisory Council co-chairman Stephanie Simmons says that in the 1930s, physicists believed "nuclear reactions were impossible. They changed their thinking and unlocked everything in six years. Commercializing a branch of physics looks hard until it doesn't." Large tech companies and start-ups are exploring different approaches to quantum technology. Notably, Google highlighted progress in error correction last December with its new quantum chip, Willow.