A lot of people have explained why they do not plan to initially buy FSD, but I have not seen anyone explain why they will buy it with the car. So I will give some of my reasons for buying FSD. First let me say that some of the reasons for delaying FSD are unassailable, if you have a tight budget, using your funds for things that cannot be added later makes sense. Some of my reasons are speculative,and my track record at guessing what Tesla is going to do has not been very accurate, you should take it with a grain of salt. I was really sure about the HUD. Mind you, most other people's guesses haven’t been much better. My best guess is that full autonomy will work and be approved by regulatory authorities in at least some parts of the United States in 2019. I am going with the estimates that it will require three billion miles of logs to get FSD completely working and convince regulators. If the Model 3 ramp goes well I would guess that we will reach the required millage by early 2019. I would estimate six months for the final sign offs by the federal government. I think that some US states will follow almost immediately. If this is correct, spending $4000 in about two years to avoid spending $3000 new is a very high interest rate. I think that FSD will be implemented as a driving aid before it is ready for full autonomy. Think of it as an Enhanced Enhanced Autopilot. So long as the driver remains in the loop and is fully responsible, I don’t think that this will present a problem for regulators. It would not surprize me if next spring, when I should get my car, that FSD will actually do something. Personally I am hoping to be able to watch the FSD option mature into real autonomy, sounds like fun,well worth $1000 if it works out as I expect. Also, someone compared it to a Kickstarter campaign and I like the idea of being able to express support and confidence in something that represents a better future.