I made a living porting Unix to new hardware in the mid to late 80s so all the busses of the day came across my desk, and designed graphics card silicon in the 90s
S-100 was very much history by the time the boxes in the article were designed (5-10 years before) VME and Multibus were the first generation workstation busses, PCs had ISA->EISA, Macs had NuBus/NuBus90 - all of them converged on PCI once chips with enough pins were packaged cheaply enough (plastic rather than ceramic - 200+ pins)
S-100 was very much history by the time the boxes in the article were designed (5-10 years before) VME and Multibus were the first generation workstation busses, PCs had ISA->EISA, Macs had NuBus/NuBus90 - all of them converged on PCI once chips with enough pins were packaged cheaply enough (plastic rather than ceramic - 200+ pins)