I have not quite understood what the benefits are of wireless car entry and ignition. You still have to carry the key with you to enable the system to work, so the only advantage seems to be that you do not have to take it out of your pocket, which seems like a very minor benefit. However, I had a female friend who said she really liked it because she uses a handbag and finding and fishing a key out of it is not as simple as with a trouser pocket.
But these things have a downside as with all things purely electronic in that the signals can be stolen out of the air. In the video below captured by security cameras, two criminals, clearly professionals, drive up to a car parked in a driveway in England and, in less than a minute, calmly manage to steal the codes from the key fob that is inside the house, get into the car, and drive off. The stolen car is a Mercedes Benz so I assume that the ignition system used is one of the best, though I am not sure if these systems are encrypted or not.
Does this mean that in order to foil such theft one should keep the key in an aluminum pouch until one is ready to use it? That seems to be a bigger hassle than simply having to insert a physical key into the door and ignition.