I use GPUs for FP64 (64-bit floating point) compute, and the best AMD GPU right now is still Radeon VII, which was released in 2019. Since then AMD split the GPU business into two lines, CDNA and RDNA, the point being to be able to charge much higher prices for the GPUs that provide good compute (i.e. CDNA).

The RDNA line is targeted at gamers. The reasoning apparently being "let's be careful that these RDNA GPUs are bad enough so they can't really be used for anything else but games; if the user is into compute, they should pay the big money for CDNA GPUs".

This is also reflected into the ROCm situation. ROCm has good support for CDNA GPUs, which is the hardware that is deployed in the huge national-lab GPU projects, where money is not an issue. The problem with that approach? normal people do not have access to CDNA GPUs that cost a multiple of 10000 USD apiece.