Both llama.cpp and ik_llama.cpp now have FP4 support — but with different flavors worth knowing about. llama.cpp recently merged NVFP4 (Nvidia's block-scaled FP4, `GGML_TYPE_NVFP4 = 40`), with CUDA kernels landing in `mmq.cuh`, `mmvq.cu`, `convert.cu` and others. ik_llama.cpp has had MXFP4 (`GGML_TY
