Dado Ruvic | Reuters Microsoft CEO Satya Nadella commented on its "real innovations." OpenAI's Sam Altman described it as "clearly a great model." Apple CEO Tim Cook said "innovation that drives efficiency is a good thing." And Palantir's Alex Karp said it shows the importance of "an all-country effort." The tech CEOs were all talking about China's DeepSeek, which burst out of obscurity and into the center of the tech universe this week. In the past few days, those execs and many of their peers have addressed questions about the startup lab's new artificial intelligence model, which has stunned experts...