Sounds like a pretty poor show, as you know I am awaiting the return of my car which had some PDI issues which I am hopeful will be resolved. Still does leave a bitter taste in my mouth in any case.
For me it won't make me look for another car or manufacturer, personally I don't buy into the whole brand thing. I bought an A8 because I wanted comfort, security (4WD and laminated glass) and something that didn't offend people (like a range rover). With that in mind I have little choice of car with which to replace my last A8, other than more of the same which ticks all the boxes. I looked at other options, every one had a compromise I didn't want to make.
I guess they don't need to care if I'm upset, unless another manufacturer ups their game, or I accept a compromise!?