So 2017 was a joke then, right? A publicity stunt so it didn't look like Elon was lying out of his ass for years talking about the 35k model before then, eh? I'm really confused how all of a sudden it's "too expensive" to build it. So what was it then?
I think they had a plan for the cheaper 35K model, with cloth seats and a few other things.
When they looked at it in detail, all those changes didn't add up to sufficient savings to justify the lower price tag.
Then there was the issue of the additional complexity in manufacturing, inventory and spare parts.
This time around it might be different as they may be able to use 4680 LFP cells made in house,
Not only are cells cheaper, there are more of them, allowing more cars to be made. When they were cell constrained, it wasn't worth trying too hard for lower priced models.
I also think autopilot HW4 and some other parts might be part of the mix. To make the 25K car they need the price of all of these components in the right ballpark, They can then use the same part for Model 3.
Let's just say Elon is occasionally too optimistic, and that priorities and circumstances sometimes change.
They did hit some issues with Model 3 production that caused them to dial back they level of automation.
They know a lot more about high volume mass production now than they did in 2017.
So the cost of the car build exceeding their initial projections would not be a surprise.
We know that front and rear castings will help reduce the cost to build a car.