Well my lovely wife of 17 years has often accused me of babbling, so you may have a point there. However about the technical aspects of this application, I'm most certainly correct.
One reason why Amsoil didn't rush a VW 505.01 oil to market for the "PD" motors is that European manufacturers were transitioning to low SAPS engine oils. Amsoils current 5w-40 exceeds the generic ACEA, C3-04 Spec, which is the starting point for BMW LL-04, Mercedes 229.51 and VW 505.01. Amsoil made a point of specifically not recommending their first Gen 5w-40 oil for the PD engines, since it only met the older VW 505.00 and ACEA B4 requirements.
There are no issues with using Amsoil in any new VW/Audi engine, in fact my local dealer does the oil changes using the Amsoil oil/filters I bring him for my Audi TT, which is still under warranty.