That would be cool if people could write new firm ware for old hardware. Do people do that?
They have stuff like magic lantern and CHDK, but I feel that compared to what deep AI could do to iterate the same process tens of thousands of times to truly get every ounce of performance out of the hardware, we have not even scratched the surface. Plus Canon intentionally cripples much of their stuff, and custom hardware could bring out some things that the hardware was always capable of doing, but that Canon didn't want because it would hurt their other products.