I’ve only ever learned two assembly languages: 6502 (when I was in elementary school in the early 80s) and 370 (my senior year of high school when I had access to the UIC mainframe thanks to taking night classes there). I can roughly follow the output of godbolt on those rare occasions that I’m curious enough to bother, but the complexity of modern CPUs and computer architectures are such that I don’t know that I really need to deal with assembly language now. That said, my mental model of how a computer works at a low level is very much based on how the Apple II was set up.