The SS20 had serial and SCSI ports, numerous multimedia ports, video expansion from 8-bit 1152x900 to muti-monitor accelerated 3d 24-bit color, and hundreds of different SBus expansion cards.  And from a processor perspective, you could (technically) start with a single 33Mhz processor and expand to 4 x 200MHz processors (from Ross) without dumping any investment.<p>Very few computers had as long a useful lifespan as the SS20, and if they weren&#x27;t so power hungry they&#x27;d likely still be in production all sorts of places.