I mean, CPUs do a bunch of work to make us believe they still operate just as a fast PDP-11, and I would wager that besides compiler experts that work on the backend parts of compilers, not many people have a real feel for modern hardware (obviously besides those that actually work on that given hardware).
So I'm not convinced that even those who think they know how it works know it actually.
So I'm not convinced that even those who think they know how it works know it actually.