Simplicity is not why Mazda developed the MX-5 Miata PRHT, since the existing model’s fabric roof is easy to use and can be lowered or raised from the driver’s seat. Rather, the new power retractable hardtop deters knife-wielding thieves, keeps the interior quieter at speed, and better insulates the cabin from foul weather. Slap a set of winter tires on the MX-5 Miata PRHT, and you’ve got a true four-season sports car.