Yes, if I need to pull mileage or update charge settings, or listen to the radio, etc. I can do that without having to energize the high voltage battery and turn all the systems on just to power them off, wastes energy and adds wear to some of the DC-DC components. If I want to just access the accessories then I simply push the button and I don't have energize everything. If I want to drive I put my foot on the brake and push the button and it turns on all the high voltage systems. If I just need to grab my wallet or bag, whatever out of the car I simply open the door and grab it. Nothing turns on and there's not power draw from anything. I also like how I can leave the car unlocked so if I'm making multiple trips or something with some time in between I don't have to keep the key on me I can just put it on the hanger when I get home.
Simply put the button press and brake pedal + push separates the 12v and high voltage systems and keeps the car from turning on unnessesarily It take no more time or effort to get in the car and start driving than with the Tesla.
If you're still talking about the leaf I don't want anything turning on when I get in the car. Is there really any time saved but the Tesla turnin on when you open the door? You still have to put your foot on the brake in the Tesla. In the leaf the car turns on when you want it and you still have to put your foot on the brake and push a button and that takes all of half a second to push the button. But what I do get in return is the car not turning on every single time I open the door. In the Tesla the 12v drain is bad enough, I don't like that opening the door just adds to it for no reason. sometime I get in the car, get situatied and realise I forgot something so getting out, taking the fob with me to open the house, shuts the car down and locks the door if I close it and keeps everything on if I leave it open. In the Leaf I just get out of the car and its no harm to anything because nothing ever turned on.