The ST models will never be popular cars, because the majority of people don't enjoy driving, prefer automatics, and don't want to pay the premium for a sportier model. So there's that.
The other issue is that dealerships seem to order 1 or 2 fully loaded models and let them rot in showrooms.
The other issue is that dealerships seem to order 1 or 2 fully loaded models and let them rot in showrooms.