What happened to sliding lens protectors (started w/ Olympus) on digital cameras?

i use to have a camera with a sliding lens protector the olympus D575 i think. but it was slow to turn on and off becouse you had to move protecotr every time. by getting rid of them it makes start ups faster also makes the camera look more sleek.

Not sure about sliding lens protecors on the Evolt but its one of the better cameras from Olympus.