I recall that Mr. Randazzo stated it wasn't possible to port highly sophisticated sim models to X-Plane and that's why he gave up with the porting of PMDG NGX and 747 series.
Well, there's evidence it's not true. :)
Will the combo w2xp + photoscenery (Simheaven or self-generated) still be compatible with XP11? You know.. like many others I wouldn't like tons of gigs of photoscenery be wasted...