Jensen Huang founded accelerated computing company Nvidia (NASDAQ: NVDA) in 1993, and has served as the CEO and president ever since. Nvidia has achieved many breakthroughs under his leadership, but the invention of the graphics processing unit (GPU) in 1999 was particularly momentous.

D-Wave Quantum CEO Alan Baratz said Nvidia’s Jensen Huang is “dead wrong” about quantum computing after comments from the head of the chip giant spooked Wall Street on Wednesday.

Shares of leading firms nose-dive after Nvidia’s Jensen Huang suggests a generational wait for fully functional quantum tech. We’ve been told that the future is now, but it seems it’s not quite here yet—at least not for quantum computing.