These three tech giants have sustainable competitive advantages and could leave Nvidia in the dust.Nvidia (NVDA -2.25%) has been one of the biggest beneficiaries of the booming demand for anything related to artificial intelligence (AI). The company's GPUs are valuable equipment used to train large language models, which provide the backbone for generative AI. Big tech companies and cloud providers are snatching up as many Nvidia chips as they can get their hands on.The results have been nothing short of ph ...