I just saw that new Unreal engine + APM SITL based simulation software (where flight dynamics seem to be calculated using JSBSim) which looks very promising as it also seems to work nativly in linux (which Realflight cant do).
Hi @julled ! Im creator of this simulator, I could make blogpost about it in this forum
P.S. Yes, we use JSBSim as a backend and we support Windows and Linux OS (at least trying to keep both working well hah)