wow. setup and hold times have been demoted to 'demystification only' and not something that is part of the formal curriculum. when I helped teach this course in the 90's, it was a major section and if you could not answer basic questions about synchronous clock discipline, you could not get an A. It was as important as stack-based calling conventions.

I mean, I guess most 'computer science' folks today can have a fecund and profitable career and have never heard of these concepts, but... I hope some people still wonder, why do we have clock speeds, and what other alternatives might exist?