Oracle’s rapid descent from market darling to market warning sign is revealing something deeper about the AI boom, experts say: no matter how euphoric investors became over the last two years, the industry can’t outrun the laws of physics—or the realities of debt financing. Shares of Oracle have plunged 45% from their September high and lost 14% this week after a messy earnings report revealed it spent $12 billion in quarterly capital expenditures, higher than the$8.25 billion expected by analysts. Ear ...