It's not ridiculous, but there's pratically no more information about it. No major tech sites have covered it, beyond Phoronix. AMD haven't acknowledged it, beyond stating that "a performance marginality problem exclusive to certain workloads on Linux" exists, which is factually incorrect as it also seems to occur on other operating systems.

I'm not spending hundreds of euro on a processor without knowing something more concrete about this issue. If you budget is really ~million dollars, do you have additional information about this that you can share?