And it worked mainly because they were a drop-in for Intel processors. Which was and is an amazing feat. I and most people could and can run anything compiled (but avx512 stuff back then on zen1 and 2 ?) without a hitch. And it was still a huge uphill battle and Intel let it happen, what with their bungling of the 10nm process.

I don't see how the same can work here. HIP isn't it right now (every time I try, anyway).