> ... we need to look a little closer at the physical structure of a data bus

Once again, I have to give a shout out to Ben Eater, whose video series on making a breadboard computer with the 6502 is why I actually understand what the article is about and what you're referring to when describing the hardware issues. (Obviously, extrapolating from his basic bus example to a commercial machine.) I'd be pretty clueless otherwise.

https://eater.net