It really comes down to maps. If the NTTR map was expanded to include California (particularly Southern California), then you could include things like Pilot Edge (http://www.pilotedge.net/), VATSIM which might attract some folks from XPlane, FSX and P3D. Although the graphics with EDGE are fantastic, it can't compete with a worldwide map. I have to tell you, after flying the graphics with NTTR map, it's hard to go back to XPlane.