I did see someone else asking if 4 wheel alignment needed an ACC radar recalibrate because he'd seen someone else mention it. People on here (myself included) said errr no.
But then you say it happened to you Joe...
As you say, this item in the future is going to be a world of expensive pain as the vehicles age...
I don't know if the 7.5's move of the radar transponder to behind the VW badge will make this problem less or more either?