In the case of the Cybertruck, it was never a question whether it is even possible to do such a thing, because they had all the technology, the only question was if they were stupid enough to build it.
Just as in the case of the "Hyperloop": in theory, it is perfectly possible, but anyone who got as far to build a few meters of it (or something resembling it) quickly realized the practicality problems, and what would happen if you scaled those problems to a few hundred kilometers...
On the other hand, autonomous driving is not a solved problem, not even in theory. One could argue that it would require some sort of a generic AI, which we don't have, and nobody knows if we will in the future. So selling anything based on that is simply fraud, in my opinion.
Just as in the case of the "Hyperloop": in theory, it is perfectly possible, but anyone who got as far to build a few meters of it (or something resembling it) quickly realized the practicality problems, and what would happen if you scaled those problems to a few hundred kilometers...
On the other hand, autonomous driving is not a solved problem, not even in theory. One could argue that it would require some sort of a generic AI, which we don't have, and nobody knows if we will in the future. So selling anything based on that is simply fraud, in my opinion.