Originally it was more like 40 or 60 systems they hoped to build; but they added systems via stretch goals after they hit the crowd-funding targets initially set. They have removed or made it hard to find old documents which weren't stored on Kickstarter (some links there just get a 404 error on RSI site now). The 100 system count was reached at $6 MUSD in funding. That Kickstarter page including the FAQs is something else to go back and review after 8 years!It was supposed to be 100 systems at launch.
And then more added, as the pipelines would be fully functional.
Thousands? Don't think so, but may very well be wrong in this.
"Chris Roberts and his teams have shown consistently that they are able to develop epic story-based games. Even with our very limited self-funding we have been able to do already a lot of work which is why we can show you not just concept art and a cinematic trailer, but an extensive demo of actual game play. [note that would be the result of a claimed year of work already put into technical development and POC.] So, we are confident that even with limited means we will be able to deliver an amazing experience."
That statement and demo and others made it seem so feasible to deliver in two years, right?! After all they got the physics and a bunch of stuff already working!