But at some point it stops being the car that I ordered as they strip parts from it. Arguably it stops being the car that I ordered the moment they decide to start taking stuff out of it.

You're buying the final product, not specific components when you place your order. As long as it functions as advertised and meets warranty requirements, it is what you were sold.

At least in the case of my Model Y, I was given the option to decline my order as it was placed before the vision transition [1], so there is disclosure and the ability to opt out.

[1] https://www.tesla.com/support/transitioning-tesla-vision