> iGPUs have been getting ever closer to entry level and even mid-range GPUs.
Not really closer. igpus got good enough to kill the low the discreet market basically entirely, but they haven't been "getting closer" to discreet cards. Both CPU SoCs and discreet GPUs have access to the same manufacturing nodes and memory technologies, and the simple physical reality is that they can just be bigger and use more power as a separate physical entity, along with memory better optimized for its workloads.
Not really closer. igpus got good enough to kill the low the discreet market basically entirely, but they haven't been "getting closer" to discreet cards. Both CPU SoCs and discreet GPUs have access to the same manufacturing nodes and memory technologies, and the simple physical reality is that they can just be bigger and use more power as a separate physical entity, along with memory better optimized for its workloads.