I left off with tubes and the early days of transistors. Still had IBM key cards. Only semi have kept up with advancements. But the tubes were so great and understandable.
The logic charts look just like the ones that had tubes implementing them. Just hundreds of thousands or Millions of them in one circuit.
My mother started her career wiring tubes with Western Electric. Ended with AT&T and printed circuit boards. With her persuasion, I got into the biz now doing 5nm layout. In her elder years she likes to ask me “Are they still making them smaller and smaller?”. Yes they are Mom.