If you bought a Tesla from before 2023 in the hopes that a future software upgrade would render it capable of unsupervised full self-driving—the as-yet unrealized dream of a truly self driving car, in other words—that’s never going to happen, Elon Musk admitted on an earnings call Wednesday . It’s possible you might be able to get a hardware upgrade, rather than having to trade in your Tesla for a new one, but from the sound of it, retrofitting hundreds of thousands of cars with new computers and cameras is going to be a colossal new project for Tesla. The FSD hardware packaged known as Hardware 3 was standard until Hardware 4 came along in early 2023 , though it took until May of that year for Hardware 4 to reach all models. (To tell which version you have , go to Settings in your infotainment system, then tap Software, and then Additional Vehicle Information).…