Why did window louvres suddenly disappear from cars?

A once-popular car modification suddenly vanished overnight. We investigate the disappearance of the car window louvres.From the 1970s to the 1990s, you couldn’t go anywhere in Australia without seeing louvres fitted to the back of anything with four wheels – wagons, sedans, and even hatchbacks.RELATED: Why did panel vans become extinct?But the Aussie ‘car-mullet’ seemingly disappeared overnight from cars, catalogues, and even the aftermarket.Still, seeing a few fitted to