Musk has been promising cross-country self driving "by end of 2017" back in 2016, and has repeated "by end of next year" a couple more years he missed the dates on.
Teslas official docs have never promised a time.
At which point (if it's the admission bit) yes I'd expect there to be refunds for the pre-3/19 folks (or lawsuits, as I said).
Two things. First, many people bought FSD regardless of Musk's failed promises, so they can't claim they were unaware Tesla wasn't going to deliver at the 'promised' time. Secondly, there were never any deadlines set officially in writing for FSD.
And a competitor beating Tesla to the punch (Waymo is already ahead technically) is meaningless for reason number two.
A lawsuit? Possibly, but I'd expect it to go nowhere. Money from Tesla? Hell would sooner freeze over. How is battery-gate doing? What about charge-gate, panel gap-gate and paint-gate?