One analyst estimates Tesla could ultimately make $25 billion a year by selling Optimus robots manufactured on former Model S and Model X production lines.

The Fremont factory will still manufacture Model 3 and Y, but the space where Model S and X are made will instead focus on mass production of Tesla's Gen 3 Optimus robots.

Tesla fast-tracks Optimus humanoid robots, shifting factory space and strategy as Musk promises mass production and a poverty-free future.

The decision ends a major chapter in Tesla's history. The Model S, introduced in 2012, and the Model X, launched in 2015, helped define the premium

Basically, driving a car like the Model S isn’t the future, but a car driving you is. In a first for the company, Tesla revealed it has 1.1 million paying subscribers for its full self-driving (FSD) business.

Initially, when electric-car maker Tesla ( TSLA 3.45%) released its fourth-quarter results, the stock popped. But shortly after the market opened on Thursday, the stock's return for the day turned negative. This has added to the stock's weakness in recent weeks. As of this writing, the stock is down more than 11% over the past month.