Perhaps you could explain(hopefully without the snark) why that matters? AIUI, though they’re shifting towards the new designs, Tesla still uses 2170’s in some of their Model 3 and Model Y (link below) - and even if they weren’t still doing it, they certainly could have chosen to continue to do so. So the Semi definitely takes batteries that could have gone into other models
Yes, they are. Or at least, Cybertruck is. Or more specifically, Tesla needs more than two models at high volume to fulfill its mission.
No single model of car - no matter how good it is - has ever sold more than about ~1.5 million units (the peak year of Corolla sales). That’s not because of car quality. People’s needs and preferences in a light vehicle are just too varied. Even if you make the single-best midsize SUV that’s ever been or ever will be made, there’s only so many people who want a midsize SUV with those specific features.
Last year, Tesla sold about 770K Model Y and 475K Model 3. Because the Cybertruck won’t be in high-volume production until 2025, for Tesla to grow ~50%, it needs to grow those models at least 50% per year (and they may have to grow the Y faster, since Model 3 sales actually fell last year from 2021, and consumer preferences generally run 2:1 SUV’s to sedans).
Even at 50%, that means Tesla would have to produce at least 1.2 million Model Y this year, and 1.7 million Model Y next year. IOW, the best-selling car in the world this year (definitely achievable), and blowing through the record for most cars of a single model ever sold in a year next year. And still needing to grow a lot in 2025, since Cybertruck and “Model 2” will not be contributing more than a few hundred K in production those years.
That’s…well, it’s a real risk to the mission. Selling more than 2 million units of a single model? It doesn’t matter how good the Model Y is - the most desirable car in the world in any given year has never been able to move more than 1.5 million, because what people want in a car varies so much. Not having a third high-volume model in a timely manner puts the mission at risk, if the variety of consumer needs and preferences puts an upper limit of how much of the same car you can sell. That risk is outside of Tesla’s control, but a third high-volume vehicle was likely necessary to keep on track.
The Cybertruck made sense as a third high-volume model. After SUV’s, pickups are the next largest slice of the U.S. market. About 20%, and three of the top six selling vehicles are pickups. It was a good choice. Not getting it done, though, subjects the mission to a really significant risk.