http://forum.avsim.net/topic/427010-.../#entry2859429
He seems to talk more about legal stuff than tehcnical limits. The 737NGX enver was licensed for P3Dv1, but it ran reliably on that platform, youtube gives evidence, and many customers confirm it.
I hate the idea of having to give up my many european airport addons. But that is a question I need to direct at Aerosoft. The few addon aircraft I bought by RealAir, are a limited financial pain if they are lost. But the airports really would hurt.