Since the Kerbal franchise appears to have been murdered by corporate greed, I'm seriously considering trying to found an "Open Space Program" that would be designed to be open-source and moddable...
@LouisIngenthron Not quite as playful as Kerbal maybe, but a former colleague wrote Orbiter flight sim and made it GPL a few years back.
https://en.m.wikipedia.org/wiki/Orbiter_(simulator)
