Then make heated seats part of the base model. In the 1950s a heater was an optional accessory, but became standard sometime in the 1960s. (I don't know exact years, if someone fact checks me I'm probably wrong, but close enough for discussion) radio went from not an option to am was an option, to FM mono, FM stereo, cassettes, CD, mp3. At one point you could get a record player as well (I think only about 200 were sold in total). AC used to be an option, became standard in the 1990s.

We will keep running this game as manufactures decide to make more and more things standard to make assembly easier.

You can get any color you want as long as it’s black.

But also fuck Tesla if I own the computer and the seats so I can do whatever I want with them

It’s quite uncommon to have line splits for specific features. The only thing in a Tesla that might require a split is dual vs single motor. Heated seats would just be a station skip, where the worker or robot ignores cars without the feature. (Source: I used to write assembly line control software for this exact sort of thing)

It doesn’t save Tesla any money, except in marshaling. If they build a mix of lots of options then they have to track them all. With their simplified option list, cars are more interchangeable.

It also makes upselling possible, even after delivery, which is 98% of why they do it.

It’s a very old practice. IBM mainframes back in the 1970s/80s would come in various configurations. ‘Upgrading’ the machine to the improved performance spec was achieved by cutting an internal wire

Then just include it. My Acura had one option, with or without navigation.

Well, for what it’s worth, I don’t think the base cars pay for heated seats. It was more of an early Model 3 thing. I could go into the economics of why, but I doubt that would be a productive conversation