I think the analogy was that a CPU can do a GPU's job, but a GPU will do it much faster. Pretty much all modern NICs are already using separate hardware to red

I think the analogy was that a CPU can do a GPU's job, but a GPU will do it much faster. Pretty much all modern NICs are already using separate hardware to reduce the load on the main CPU. I.e. using a different CPU to do more CPU. Without that you're looking at sacrificing a whole core or two just to handle 1Gbps, nevermind 10+.