Re: Go back to your webdesign!
"Learn about how CPUs are designed these days. And stay out of planes, will you."
Actually I am not and have never been a web designer, but I do have a reasonable idea how industry in general designs+verifies CPU architectures and implementations, now and for the last couple of decades.
I also have a rather closer idea of how one particular 'modern' custom CPU for safety critical use (in planes and elsewhere) has been designed. It's a customer-specific implementation of a customer-specific architecture, with all the snags and none of the benefits of such an approach, not that the regulatory authorities seem to care.
And long before that I remember the RSRE Viper processor fiasco (formally proven, but the proof was wrong).
But carry on attacking the messenger rather than the message, it's the only way to enlightenment.