Earlier quoted context omitted.
I get it, the Beige Box of Theseus. I guess most would probably assume at least one epic refresh where there wasn't really anything carried across except maybe the parking spot on your desk. And since the 486 era, most probably expect your desk and/or physical site changed too. There were so many potential PC era boundaries like case and motherboard form factors, external peripheral buses, HDD controller types, expan…
> There were so many potential PC era boundaries like case and motherboard form factors Only one change really from AT/Baby AT to ATX. We've been on ATX now for 30 years. I could grab an A-Bit BH6 motherboard from 1998 and put it in my modern Hyte Y60 case if I wanted to. > external peripheral buses Since we're talking starting from 486 era, that only means going from PS/2 to USB for keyboard/mouse, parallel port for…
ESDI and ST-506 MFM/RLL before it lived in universe of dedicated HDD interface cards.