Doesn't it also have requirements (which may or may not be strongly enforced) that users are not allowed to run their own kernel code? (because you could then u

Doesn't it also have requirements (which may or may not be strongly enforced) that users are not allowed to run their own kernel code? (because you could then undermine most of the point of this whole system.) With possible key revocation (blacklisting) being the enforcement? The cost alone is one thing, that'd only ruin the ability of hobbyists to create new OSes. Something exceedingly rare anymore, sadly. But the restrictions stating what your kernel is allowed to let you do is quite another. I want the ability to write my own kernel space drivers on my own hardware, if I so choose (and I have done so in the past.)