Last week, the emergence of a new AI model from China's DeepSeek sparked investor concern that the AI spending boom may cool off as companies find cheaper ways to fulfill their AI goals. This spawned a massive sell-off in Nvidia's (NVDA) stock, with the prevailing thought being that companies may not allocate as much spend to Nvidia's expensive AI chips. But as Big Tech earnings have rolled on, few signs have emerged of a spending slowdown. The most recent example came on Tuesday night, with Alphabet (GOOGL GOOG) saying it plans to lay out $75 billion in capital expenditure in...