The usual FSD complaint is that Tesla has been offering it for years, at ascending prices, without any date-certain of delivering it (just tweets predicting it), without refunding it when not delivered after X years. I can easily imagine an eventual class-action suit requiring some % of refund all the way back to the first car purchased with someday-FSD (!).

If they deliver it, then (at that time, and depending on how well it works), the complaints of not-good-enough or dangerous-killing-people could come into play.

The second thing sounds even more dangerous to Tesla - smart to keep delaying (and building up that first risk higher and higher!)