Elon Musk may have just made the SMR nuclear power industry irrelevant.SpaceX is planning to IPO, and this could be bad news for Oklo (OKLO +1.45%). Shares of the start-up atomic technology stock fell more than 6% in early trading Thursday before finding their footing. As of 2:25 p.m. ET, Oklo stock is back in the green and up 1.5%.But these gains may not last. SpaceX's AI ambitionsWhy not? The answer goes straight back to why Oklo stock (presumably) tanked this morning.Yesterday evening, Ars Technica confi ...