Tesla has slashed the price of its Full Self-Driving (FSD) software subscription to $99 per month, down from $199 per month, as the electric vehicle maker aims to boost adoption of its advanced driver assistance system ahead of first-quarter earnings. The price cut comes a couple of weeks after Tesla launched a free one-month trial of FSD for every customer in the U.S. with a compatible Tesla. That trial is still ongoing. Formerly known as FSD Beta, Tesla is now referring to the software as “Sup...