Likely not. It seems to be more of a supply practice in order to promote lot turnover and prevent previous model years from sitting on the lot rather than help

Likely not. It seems to be more of a supply practice in order to promote lot turnover and prevent previous model years from sitting on the lot rather than help the company's finances directly. There's a perception that if an older model year car is on the dealership lot brand new, either the model is undesirable or that specific car has a defect. Unfounded or not the brands don't want that association.