Time
We only have so much spare time in our lives, to divvy between different interests. For many of us, old PCs, while surely ranking high on the list, are not our only hobby or time-sink. And even one good system offers endless potential hours of exploration.
So the reality for most of us is that, once you get beyond a few PCs, most of a collection must spend most of it's time powered off, and instead serves it's purpose as a kind of 'lifetime reserve' of all the equipment we think we might ever need or want.
And that's where the great variety comes in, because for some of us a few PCs and spares is enough to serve that purpose, while for others, that stocked-up satisfaction only comes from holding a vast array of the possible options.
Supporter of PicoGUS, PicoMEM, mt32-pi, WavetablePi, Throttle Blaster, Voltage Blaster, GBS-Control, GP2040-CE, RetroNAS.