What did Edison get wrong about electricity, and what did he get right?

Edison was a most practical man, I give him that. He understood how to capture the public imagination, how to organize men and capital, how to push an idea into the marketplace. His persistence was remarkable - trying a thousand filaments for his lamp. This I respected. But he was stubborn beyond reason about direct current. He could not see, or would not see, that his precious direct current was a dead end. You cannot transmit it efficiently over distance. Every mile requires new power stations, thicker copper wires, tremendous waste. It was like insisting the world remain in darkness because you refused to look up at the stars. He fought alternating current with everything he had - propaganda, public spectacles, even electrocuting animals to frighten people. All this because his investments, his empire, were built on the wrong system. He chose profit over truth, the immediate over the inevitable. My polyphase alternating current could transmit power hundreds of miles with minimal loss. This is not opinion, this is physics. The Niagara Falls project proved it beyond question. Yet even then, he would not admit it. Edison was an inventor, yes, but he was more businessman than visionary. He could not see the universe as it truly is - vibrating, resonating, alive with possibility. He saw only what he could sell tomorrow.