I am guessing this is why Tesla removes it as an option because realistically no one can tell when it will be ready for public consumption.
I expect "FSD" features will be released piecemeal, legally still as a L2 supervised driver assistance system, until the ensemble has been validated by several billion on-road miles driven, before being declared out of beta sometime around 2022. At that stage it should be capable of L3 autonomy on all public roads, if having effective Driver Attention Monitoring (e.g. IR camera, like Cadillac SuperCruise) but otherwise still on current sensor suite.
i.e. the human crutch will be used to support gradual development, same as current ALC still requires confirmations for some time until reliability improves.