The split had more to do with GCN being very compute heavy and AMD's software completely failing to take advantage of that. GCN got transitioned into CDNA, and

The split had more to do with GCN being very compute heavy and AMD's software completely failing to take advantage of that. GCN got transitioned into CDNA, and got heavily reworked for graphics as RDNA. This is why while RDNA is nowhere near as good at compute oriented features, it tends to outperform NVIDIA in pure rasterization. In contrast, current NVIDIA GPUs are very compute heavy architectures (to the point that they often artificially limit certain aspects of their consumer cards other than fp64 to not interfere with the workstation cards), and they take great advantage of it all with their various features combining software and hardware capabilities.