I really like the convenience of keyless entry, I keep my key in my backpack and like being able to walk up to the car, have it automatically unlock when I grab

I really like the convenience of keyless entry, I keep my key in my backpack and like being able to walk up to the car, have it automatically unlock when I grab the door handle, then I just get in and press "start", and it's ready to go. Then when I get to work, I just grab my backpack and walk away and I know the car will lock behind me. I don't want to move back to a physical key. That convenience shouldn't have to be traded for the huge vulnerability of allowing replay attacks.