So AVIN did come back with a $50 "loyalty discount" on the purchase of the new Avant-4 system running Android Pie 9.0. From my reading on all the other systems and the option for upgrading the Android OS on an existing Android OS head unit, I am not sure there will ever that option.
So call me crazy but it looks like I have bought the new AVIN Avant-4 running Android 9.0 Pie and have an extra (less than 1 month old) AVIN Avant-4 running Android 8.0 Oreo sitting on the shelf.
I guess I can put it in my E46 if the factory navigation ever gives up.