The only thing that changed compared to two years ago, is that a new version of Flight Simulator is coming ( something we didn't know back then ) so, any smallest chance there was to ever start supporting X-Plane, is basically gone now.
Not because we don't like X-Plane, but simply because we simply don't have the resources and manpower to support so many simulators. GSX is heavily based on Simconnect, which is supported by FSX, P3D and MS2020, while X-Plane is very different, so porting GSX to it would be quite complex, and we are too busy right now with other things.
