Take delivery.
You'll never take delivery because Tesla constantly updates their vehicles if you are waiting for the next big thing before accepting the car. The first Austin Y's may have the 2170 batteries but then switch to the 4680 and you would want to wait for that. Then after that, they may up the capacity to 90 kwh and you would want to wait for that. It's an endless sea of updates. Take delivery now. You ordered the car on the basis of how the car was at the time of order. Plus you're in Cali. You're getting a Fremont Y. The initial small batches that would come out of Austin will go East. Plus Fremont will transition over to Y 2.0 Chassis as well at some point( look another point people will want to place their order on hold.....).