There are so many choices if you're a top talent in silicon. Apple, Amazon, AMD, Nvidia, Qualcomm, Broadcom, one of many AI accelerator startups, Tencent, Alibaba, Baidu, Microsoft, Meta, Google, ARM, TSMC, Micron, Samsung. Just off the top of my head.
Everyone is making custom CPUs or accelerators, or both nowadays. This isn't 2005.