What is Elon Musk’s ‘Idiot Index’: The metric that is said to shape SpaceX, Tesla, and xAI

Elon Musk has built his reputation around a consistent idea that many industries are slower and more expensive than they need to be. From electric vehicles to spaceflight and artificial intelligence, his companies have entered sectors traditionally dominated by large, slow-moving organisations with long supply chains and high operating costs. Musk has repeatedly argued that these costs are not always the result of technical difficulty. Instead, he has said they often reflect accumulated inefficiencies, outdated design choices, and systems that no longer question their own assumptions.