After promising full self-driving updates for years, Elon Musk finally admits that most existing Teslas may never be able to drive themselves

Pretty much every year for the last five years, Elon Musk has promised that a full self-driving update for existing Tesla cars was just a year or so away. But now the Tesla CEO has dramatically changed his tune. It may not happen, after all.

In a conference call discussing the electric car company's financial results (via Electrek) Musk dropped a veritable bomb when he said, "there is some chance that HW3 does not achieve the safety level that allows for unsupervised FSD."

To unpick that statement...