I mean, sure, for certain x86 things... like 20 years ago, but IIRC their host controllers were not though, and that isn't but a fraction of all CPUs. Think ab

I mean, sure, for certain x86 things... like 20 years ago, but IIRC their host controllers were not though, and that isn't but a fraction of all CPUs. Think about how many billions of devices there are where you can't get simple a pinout diagram for the main CPU. I would argue only a tiny, TINY, percentage of any Linux devices actually have CPUs/SOCs/SOMs with sufficient documentation to look at from a hardware design standpoint.