It makes sense to have a push button for a gas engine, but for some reason a hybrid camry I drove also had the same push button, and it was impossible to know w

It makes sense to have a push button for a gas engine, but for some reason a hybrid camry I drove also had the same push button, and it was impossible to know what that button did. I put the car in reverse, and nothing would happen. Of course, I could put the car in park, and walk away and it would shut itself down. So the button is only needed when starting the car, and it must be pressed before shifting. I think this is a smart move by Tesla, because I found push-to-start in a toyota hybrid confusing.