Most people assume companies never delete revenue sources, but the answer is **A**. As of mid-January, you can no longer *buy* FSD; you can only *rent* it for $99/month. This single UI change explains the valuation. Wall Street loves "Software as a Service" (SaaS) multiples (20x revenue) far more than "Auto" multiples (1x revenue). Tesla forced a valuation reset by deleting the option to own the software.