Their ambitions for scaling production are meager: to start making Model 3's at a rate of 5000/week by 2018, which wouldn't even match the rate at which cars rolled out of that very same factory when GM/Toyota owned it. If they kept up that rate for a whole year, that'd represent around 0.7% of US car sales. Terrifying, or just one of many small car brands on the market?
By 2019 they want to double that rate to 10K/week... but that assumes there are 10,000 people a week that want to buy an EV at (according to Mr. Musk) an average price of $42,000 or more -- significantly higher than the average new vehicle selling price.
Right now, less than 2500 people a week buy any type of electric or plug-in hybrid car of any make or model in the entire country. So Tesla needs to quadruple demand for electric vehicles and then capture all of it within ~21 months to meet their targets. By 2019 they'll also be up against a bevy of EVs from those other auto makers, likely at lower price points. The 2018 Nissan Leaf, with 200+ miles of range and ProPilot (limited) self-driving capabilities might even beat the Model 3 to market, and will almost surely be cheaper.
What valuable IP does Tesla have to license out that would terrify auto makers?
There are plenty of other suppliers of EV motors, chargers, inverters, control systems, battery cells, battery packs and battery management systems. LG Chem's nearly reached price parity with Tesla/Panasonic (and has several gigawatt-hour-per-year scale factories of its own, with more in construction). BYD, Foxconn, Boston Power, Samsung SDI, SK Innovation, etc are bringing in 150+ GWh per year of EV battery production capacity by 2020.
Their "Autopilot" software is built on Intel Mobileye (V1) and Nvidia's DRIVE PX2 (V2) platforms, which any other car company can license. The Supercharger network doesn't seem to offer anything technology wise that isn't matched by the Combined Charging System (CCS), which is rolling out 350 kW chargers throughout 2017, with the US government's backing. So what do they have that their competitors would value enough to license from them, knowing they're funding the competition?