This is happening, albeit slowly, fwiw. Pytorch has ROCm support, but not great. AMD did win the exascale machine contracts and have custom hardware in the machines that are built. It does look like they've been using those contracts to invest more into computational sciences/ML. I can only hope that they continue at the pace they have in the consumer market. Competition between AMD and Nvidia (and hopefully Intel -- a pipe dream) can only be beneficial to us in the ML community.
Last I checked they already had monopoly evoking shares of that market. Like 80+ or 90+ percent
It would be nice if everyone writing UNIX-like drivers gave away their source code, but then the books wouldn't balance. It's a tale that's half a century old now.