I think what is supposed to happen is that the JITS generated general assembly for the whole Mill family which then goes through the standard specializer progra

I think what is supposed to happen is that the JITS generated general assembly for the whole Mill family which then goes through the standard specializer program to work with the particular model. But you're right that changing the hardware/software boundary is really complicated and I expect that to succeed the Mill will have to spend a lot of time incubating in some sort of high end embedded role before the ecosystem needed for a general purpose application processor is there. So things like network switches, cell towers, robots, etc. The sort of thing where you might already be running Linux on top of some sort of RTOS.