That is not true.
That agreement is there forever and we postponed our deliveries 3 times in past years.
You can see they say "Tesla MAY cancel your order" but they never do that.
One time when we ordered 2021 MY they informed us that vehicle will be ready next week.
At the same time they started delivering 2022 model and started talking about new ryzen chip.
We refused delivery, waited one more month and got what we wanted - 2022 and new computer.