My Subaru wears tires so slowly and evenly there's really no point in rotating them. My last set of tires were all down to 6/32" after 63K miles of use without rotations. I managed to get a good deal on some Pirelli P7 A/S tires so I just mounted them and kept the others for spring-fall use. After 24K miles there still 8.5/32" remaining on all four tires without any rotations. So in short, I agree that rotating tires is overrated.