That will never happen, simply because people would buy it at that price and Tesla would make no profit, ever. Yes, some percentage of people would “subscribe” to FSD, but then you would have to make that “profit per car” back over the lifetime of the subscription, and then also make up for those people who don’t take the subscription, which percentage would only be a guess. Whatever it is, the “paying customers” would have to make up for the non-paying ones, which means pricing the subscription higher than if it were included in the profit margin of the car in the first place.
It’s worth mentioning that FSD is going to come with plenty of its own costs: liability for accidents if the first and most obvious, but there is going to have to be a building or two full of software engineers updating code, improving security against the ever improving hackers, adding new options, and so on. It’s not as though once it’s done it’s done. It hasn’t been for Microsoft, for Google, for Amazon, for Apple, or for anybody else. Why would this be different?
Some of these ideas that float around are just loopy. Nobody’s going to own a car. They’re all going to look like toasters. Tesla will give away cars at cost. I mean, yes of course there are going to be changes, and big ones - but over a long time frame, that’s just how it works.