There's a massive amount of effort in https://github.com/orgs/ROCm/repositories?type=all
Throwing a vast amount of effort at something isn't sufficient.
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.
Throwing a vast amount of effort at something isn't sufficient.