Re: RIP
"The chromebook on which I'm writing this was hardly unimaginable then but I never wondered how long it would take"
As a fellow S-100 to Chromebook, I regret I can only upvote once.
Kids today, what do they know? Even Arduinos aren't as much of a convergence of processor, system and software knowledge as you needed in those days, when you could trace the effect of your instructions with an oscilloscope.