I am not going to provide legal advice. I don't know the relevant law. What someone should discuss with a lawyer is:
Consumers potentially could bring a class action against Tesla for false advertising.
For example:
Clarifying Standing In False Ad Cases At 9th Circ. | Article | Law360 | Foley & Lardner LLP
Potentially, a court hearing that false advertising case would make a factual finding that Tesla knowingly lied or made recklessly false statements about (1) the functionality of FSD; and/or (2) the timing that FSD would be provided to customers.
Potentially, the court's factual finding in that regard could then be relied upon by individual plaintiffs to seek reimbursement of the money they paid for FSD.