I presume they done this to the newer RAC Trackstar models because of the call outs that Subaru Assistance had. The technician that I got out (same guy twice) was really helpful and knowledgeable. He told me he would get called out to the same people several times and it was normally low mileage/weekend toys that the drain happened too. Also the Newage cars have different alternators from the Classics, as the Newage ones have a chip in them so they charge differently. A few years ago this was a popular topic over on ScoobyNet and everyone agreed it was down to the RAC Tracker.