This is the best article on why OpenCL failed:
https://www.modular.com/blog/democratizing-ai-compute-part-5...
However the amount of resources at stake is incredible. The delta between NVIDIA's value and AMD's is bigger than the annual GDP of Spain. Even if they needed to hire a few thousand engineers at a few million in comp each, it'd still be a good investment.
https://www.modular.com/blog/democratizing-ai-compute-part-5...