From Geohotz's investigation in the matter, it doesn't look like it's a manpower issue, it's a quality/culture issue. AMD's firmware GPU division isn't amazing.

I've harped on this on the past, the "official" hardware support list is tiny: https://rocm.docs.amd.com/en/latest/release/gpu_os_support.h...

But, it's worth noting there's different levels of "support." With ROCm 5.6, the 7900XT and 7900XTX RDNA3 cards, while not "officially" supported are gfx1100, which have rocBLAS/MIOpen kernels and work w/o jiggerpokery w/ PyTorch nightly and various HIPified inferencers I've tried like ExLlama.