I'm sorry to say, but this has been going on for much much longer than 30 days, but it's true that most people didn't notice
Forbes article about it: https://www.forbes.com/sites/maryroeloffs/2023/07/27/tesla-exaggerated-its-cars-driving-range-and-canceled-service-appointments-if-drivers-complained-report-says/
I'm sorry to say, but this has been going on for much much longer than 30 days, but it's true that most people didn't notice