For investors concerned that US tech giants are recklessly big bets on generative artificial intelligence (AI), the latest quarterly results from big tech offered some reassurance. Growing business demand for Amazon’s cloud services, Microsoft and Google was hot. Amazon boss Andy Jassy put it very vividly. He said that AI revenue for Amazon Web Services (AWS) was experiencing triple-digit growth, three times faster than AWS grew in the early years after pioneering cloud computing in 2006.