Normally your thinking/logic is correct, but they have started to change model years by year end now, as oppose to before.
We also extrapolated data based on the battery revision. We have confirmed customers that took delivery in Early Oct with a "M" model-year designation for MY 2021. Also confirmed battery pack rev H.
Both of my 2 ready-for-delivery cars with MY 2020, built in Sept/20. So from this I would assume, anything build starting Oct, 2020 will be "M" MY 2021 cars with rev H battery. Becasue I believe ColdWeatherEV mentioned his '21's built date was 09-20, so anything after that would be '21s no matter what.
We don't know if the 371 EPA rating will trickle down back to Sept 20 built cars with rev G batteries, although this could happen since rev G has the new wiring, but then why would there be a rev change IF batteries are the same? What if somehow, the 371 rating is only rev H pack and '21 model year. Then I would be amiss to not ask for a delay delivery and get the right car.
So to play it safe, I want to take delivery of 2021 MY with rev H pack.
When I took delivery of my 90D in Oct of 2016, I was a week off from getting the AP2.5 hardware, so I'm stuck with 2.0 - and cannot upgrade.
So this time around, I would rather wait and nag the sales rep till I get the '21 build instead. With my luck, the re-design will happen in 2022, and I will be jealous again, and probably go give Elon some more of my hard earn money.
-ThinkMac-
You are all not thinking of this correctly.
You're all talking about this as if Tesla saves up changes for the "new model year". That's how other car companies do it--not Tesla. Tesla rolls in changes constantly in realtime when they feel like it and doesn't save them up. And this idea that you can get a "2021" version car in October or November doesn't happen. They switch over the model years on the cars coming off the production line sometime in the last few weeks of December, and the "2020" model year cars are completely identical to the "2021" model year cars that are made the next day.