I am no MBA but how do mass market auto makers defend margins like these in the presence of robust competition? Porsche is a brand built basically on top of VW

I am no MBA but how do mass market auto makers defend margins like these in the presence of robust competition? Porsche is a brand built basically on top of VW infrastructure and they painfully win their high margins from expensive add-ons to cars which are (mostly) shared platforms with VW and Audi. Can Tesla carve out a similar niche? If you look at value, Teslas are not at the top of the list in terms of quality or the percentage by which their batteries empirically under/over-perform their range ratings. Consumers are slowly coming to learn how to compare EVs and no matter how well things go for Tesla I am a bit skeptical that their profit margins will survive fully intact.