There are quite a few single-board computers out there that appear on tindie, etc. Usually people design a board, get it up and running, sell it for a few months or years then it dies off.
RC2014 has been quite long-lived by contrast, I guess having the various extensions/addons helps encourage people to keep tinkering with it.
I bought a single-board Z80-based system a few months back, and I guestimate there are about 50 of those specific boards in existence - but it doesn't matter too much how many of a specific board exist, so long as the CP/M archives continue to be maintained a new design isn't so hard to create.
RC2014 has been quite long-lived by contrast, I guess having the various extensions/addons helps encourage people to keep tinkering with it.
I bought a single-board Z80-based system a few months back, and I guestimate there are about 50 of those specific boards in existence - but it doesn't matter too much how many of a specific board exist, so long as the CP/M archives continue to be maintained a new design isn't so hard to create.