Being put in a jar will replace the reality for you. All your memories will be replaced with the simulated ones, you will always remember that you are living a great life. And you will never know that it is not normal to drive to work continuously forever, slipping into a sweet sleep sometimes, being the consciousness of a self-driving car that is owned by a better, more rich, man. One day he will get too fucked up at the party, will drive in a manual override and will kill you. He will survive and just buy a new car.