>The issue is that nobody, not Apple, not AMD, not Intel, has been treating Nvidia's hardware as a serious threat
Google has and they've built a much more cost efficient (for them) system: the TPU. They even rent them out, and in terms of cost per unit compute TPUs are significantly cheaper than renting GPUs from the big cloud providers. Amazon's also tried to do something similar with Trainium chips, however they're usefulness is more limited due to software issues (Amazon's much weaker at compiler development than Google, so Trainium software is quite slow and buggy).
Google has and they've built a much more cost efficient (for them) system: the TPU. They even rent them out, and in terms of cost per unit compute TPUs are significantly cheaper than renting GPUs from the big cloud providers. Amazon's also tried to do something similar with Trainium chips, however they're usefulness is more limited due to software issues (Amazon's much weaker at compiler development than Google, so Trainium software is quite slow and buggy).