The stock market has been dominated by a single industry many times in history: railroads (Union Pacific), oil (Standard Oil, later Exxon), steel (U.S. Steel), banking (JPM), industrials (GE), telecom (ATT), computer hardware (IBM, MSFT, Intel), smartphones (Apple), consumer internet (Facebook, Google, Amazon) and now "AI" (Nvidia, Magnificent 7).

Isn't the interesting question now: what follows? Or does history end with Mag7?