This speaks volumes about priorities.
I would not expect an automobile manufacturer to elevate a purely cosmetic issue that may affect some cars to the level of a recall. Moreover, it is a cosmetic issue that cannot even by seen. It is not a safety issue. It is not a performance issue. I would be disappointed in BMW if it were to put aside higher priority activities for something as trivial as this.
As for the owner of this car, it is an issue of priorities as well. I own my BMWs because they are driver's cars. I could give a crap if there is some superficial rust under the seat. I spend my time sitting on the seat looking down the road.
2013 BMW F10 M5
2012 BMW R1200GS
1994 Porsche 964 TL
Former Bimmers: E90 M3 6 Speed; E46 M3; E36 M Roadster; E34 535i