Correct me if I'm wrong, but as far as I know, no one has taken delivery of the Roadster announced 9 years ago; all of your examples are cars having more demand than supply (and in the case of the Trabant and the Lada, fewer years); as for the Morgan Plus 8, Morgan make a deliberate choice to keep the production figures where they were, despite the high demand. The key difference seems to be between little supply (your examples) and no supply.
Usually, if you had been unable to deliver a product in that time, it's probably about time to cancel it. Of course, I may be wrong, but my understanding is that 9-year-ago-announced Roadster has not been cancelled, and people have not been refunded.
Usually, if you had been unable to deliver a product in that time, it's probably about time to cancel it. Of course, I may be wrong, but my understanding is that 9-year-ago-announced Roadster has not been cancelled, and people have not been refunded.